Day 25

Day 21 part 2 and challenge texts
Solution for day 24, trial and error
2024-12-25 06:28:06 +01:00 · 2024-12-24 23:19:12 +01:00 · 2024-12-24 17:09:01 +01:00 · 2024-12-23 19:22:56 +01:00 · 2024-12-23 09:57:03 +01:00 · 2024-12-23 09:23:59 +01:00
150 changed files with 2087134 additions and 35 deletions
@@ -1 +1,2 @@
 AoC2021/Bene/
 __pycache__
@@ -1,17 +1,14 @@
 #!/usr/bin/env python3
 import sys
 import regex as re
 from itertools import combinations
 from more_itertools import locate
 def memo(f):
    memo = {}
    def f2(x,y):
-        if (x,y) not in memo: memo[(x,y)] = f(x,y)
+        if (x,tuple(y)) not in memo: memo[(x,tuple(y))] = f(x,tuple(y))
-        return memo[(x,y)]
+        return memo[(x,tuple(y))]
    return f2
@@ -19,37 +16,26 @@ def fulfills(spring, cond):
    return [len(b) for b in spring.split('.') if len(b) > 0] == cond
-def solve_row1(spring, cond):
+def dot(spring, cond):
-    if len(spring) == (sum(cond) + len(cond) - 1): return 1
+    if len(spring) == 0 or spring[0] != '#': return solve_r(spring[1:], cond)
-    if fulfills(spring, cond): return 1
+    else: return 0
-    sols = 0
+
-    not_dam = spring.count('?') + spring.count('#') - sum(cond)
+
-    if not_dam < 1: return 0
+def hashtag(spring, cond):
-    inds = list(locate(spring, lambda x: x == '?'))    
+    c = cond[0]
-    for c in combinations(inds, not_dam):
+    if len(spring) < c: return 0
-        rs = list(spring)
+    for x in range(c):
-        for i in c:
+        if spring[x] == '.': return 0
-            rs[i] = '.'
+    return dot(spring[c:], cond[1:])
        if fulfills(''.join(rs),cond): sols += 1
    return sols
@memo
 def solve_r(spring, cond):
-    if cond == '': return 1
+    cond = [int(c) for c in cond]
-    cond = [int(c) for c in cond.split(',')]
+    if cond == []: return 1 if spring.count('#') == 0 else 0
-    spring = spring.strip('.')
+    if not '?' in spring: return 1 if fulfills(spring, cond) else 0
-    inds = list(locate(spring, lambda x: x == '.'))    
+    if spring == '': return 0
-    if inds == []:
+    return dot(spring, cond) + hashtag(spring, cond)
        if len(spring) > 10: print(spring, cond)
        return solve_row1(spring, cond)
    i = inds[0]
    sols = 0
    for j in range(0, len(cond)):
        if sum(cond[:j]) <= len(list(locate(spring[:i], lambda x: x != '.'))) and sum(cond[j:]) <= len(list(locate(spring[i:], lambda x: x != '.'))):
            cond1, cond2 = ','.join([str(c) for c in cond[:j]]), ','.join([str(c) for c in cond[j:]])
            sols += solve_r(spring[:i], cond1) * solve_r(spring[i+1:], cond2)
    return sols
 if __name__ == '__main__':
@@ -57,9 +43,8 @@ if __name__ == '__main__':
    res1 = 0
    res2 = 0
    for s in springs:
-        res1 += solve_r(*s)
+        res1 += solve_r(s[0], [int(c) for c in s[1].split(',')])
-        res2 += solve_r('?'.join([s[0]]*5),','.join((s[1].split(','))*5))
+        res2 += solve_r('?'.join([s[0]]*5),[int(c) for c in s[1].split(',')*5])
        print(solve_r('?'.join([s[0]]*5),','.join((s[1].split(','))*5)))
    # challenge 1
    res1 = str(res1)
@@ -0,0 +1,165 @@
 --- Day 15: Lens Library ---
 The newly-focused parabolic reflector dish is sending all of the collected light to a point on the side of yet another mountain - the largest mountain on Lava Island. As you approach the mountain, you find that the light is being collected by the wall of a large facility embedded in the mountainside.
 You find a door under a large sign that says "Lava Production Facility" and next to a smaller sign that says "Danger - Personal Protective Equipment required beyond this point".
 As you step inside, you are immediately greeted by a somewhat panicked reindeer wearing goggles and a loose-fitting hard hat. The reindeer leads you to a shelf of goggles and hard hats (you quickly find some that fit) and then further into the facility. At one point, you pass a button with a faint snout mark and the label "PUSH FOR HELP". No wonder you were loaded into that trebuchet so quickly!
 You pass through a final set of doors surrounded with even more warning signs and into what must be the room that collects all of the light from outside. As you admire the large assortment of lenses available to further focus the light, the reindeer brings you a book titled "Initialization Manual".
 "Hello!", the book cheerfully begins, apparently unaware of the concerned reindeer reading over your shoulder. "This procedure will let you bring the Lava Production Facility online - all without burning or melting anything unintended!"
 "Before you begin, please be prepared to use the Holiday ASCII String Helper algorithm (appendix 1A)." You turn to appendix 1A. The reindeer leans closer with interest.
 The HASH algorithm is a way to turn any string of characters into a single number in the range 0 to 255. To run the HASH algorithm on a string, start with a current value of 0. Then, for each character in the string starting from the beginning:
    Determine the ASCII code for the current character of the string.
    Increase the current value by the ASCII code you just determined.
    Set the current value to itself multiplied by 17.
    Set the current value to the remainder of dividing itself by 256.
 After following these steps for each character in the string in order, the current value is the output of the HASH algorithm.
 So, to find the result of running the HASH algorithm on the string HASH:
    The current value starts at 0.
    The first character is H; its ASCII code is 72.
    The current value increases to 72.
    The current value is multiplied by 17 to become 1224.
    The current value becomes 200 (the remainder of 1224 divided by 256).
    The next character is A; its ASCII code is 65.
    The current value increases to 265.
    The current value is multiplied by 17 to become 4505.
    The current value becomes 153 (the remainder of 4505 divided by 256).
    The next character is S; its ASCII code is 83.
    The current value increases to 236.
    The current value is multiplied by 17 to become 4012.
    The current value becomes 172 (the remainder of 4012 divided by 256).
    The next character is H; its ASCII code is 72.
    The current value increases to 244.
    The current value is multiplied by 17 to become 4148.
    The current value becomes 52 (the remainder of 4148 divided by 256).
 So, the result of running the HASH algorithm on the string HASH is 52.
 The initialization sequence (your puzzle input) is a comma-separated list of steps to start the Lava Production Facility. Ignore newline characters when parsing the initialization sequence. To verify that your HASH algorithm is working, the book offers the sum of the result of running the HASH algorithm on each step in the initialization sequence.
 For example:
 rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7
 This initialization sequence specifies 11 individual steps; the result of running the HASH algorithm on each of the steps is as follows:
    rn=1 becomes 30.
    cm- becomes 253.
    qp=3 becomes 97.
    cm=2 becomes 47.
    qp- becomes 14.
    pc=4 becomes 180.
    ot=9 becomes 9.
    ab=5 becomes 197.
    pc- becomes 48.
    pc=6 becomes 214.
    ot=7 becomes 231.
 In this example, the sum of these results is 1320. Unfortunately, the reindeer has stolen the page containing the expected verification number and is currently running around the facility with it excitedly.
 Run the HASH algorithm on each step in the initialization sequence. What is the sum of the results? (The initialization sequence is one long line; be careful when copy-pasting it.)
 Your puzzle answer was 511257.
 --- Part Two ---
 You convince the reindeer to bring you the page; the page confirms that your HASH algorithm is working.
 The book goes on to describe a series of 256 boxes numbered 0 through 255. The boxes are arranged in a line starting from the point where light enters the facility. The boxes have holes that allow light to pass from one box to the next all the way down the line.
      +-----+  +-----+         +-----+
 Light | Box |  | Box |   ...   | Box |
 ----------------------------------------->
      |  0  |  |  1  |   ...   | 255 |
      +-----+  +-----+         +-----+
 Inside each box, there are several lens slots that will keep a lens correctly positioned to focus light passing through the box. The side of each box has a panel that opens to allow you to insert or remove lenses as necessary.
 Along the wall running parallel to the boxes is a large library containing lenses organized by focal length ranging from 1 through 9. The reindeer also brings you a small handheld label printer.
 The book goes on to explain how to perform each step in the initialization sequence, a process it calls the Holiday ASCII String Helper Manual Arrangement Procedure, or HASHMAP for short.
 Each step begins with a sequence of letters that indicate the label of the lens on which the step operates. The result of running the HASH algorithm on the label indicates the correct box for that step.
 The label will be immediately followed by a character that indicates the operation to perform: either an equals sign (=) or a dash (-).
 If the operation character is a dash (-), go to the relevant box and remove the lens with the given label if it is present in the box. Then, move any remaining lenses as far forward in the box as they can go without changing their order, filling any space made by removing the indicated lens. (If no lens in that box has the given label, nothing happens.)
 If the operation character is an equals sign (=), it will be followed by a number indicating the focal length of the lens that needs to go into the relevant box; be sure to use the label maker to mark the lens with the label given in the beginning of the step so you can find it later. There are two possible situations:
    If there is already a lens in the box with the same label, replace the old lens with the new lens: remove the old lens and put the new lens in its place, not moving any other lenses in the box.
    If there is not already a lens in the box with the same label, add the lens to the box immediately behind any lenses already in the box. Don't move any of the other lenses when you do this. If there aren't any lenses in the box, the new lens goes all the way to the front of the box.
 Here is the contents of every box after each step in the example initialization sequence above:
 After "rn=1":
 Box 0: [rn 1]
 After "cm-":
 Box 0: [rn 1]
 After "qp=3":
 Box 0: [rn 1]
 Box 1: [qp 3]
 After "cm=2":
 Box 0: [rn 1] [cm 2]
 Box 1: [qp 3]
 After "qp-":
 Box 0: [rn 1] [cm 2]
 After "pc=4":
 Box 0: [rn 1] [cm 2]
 Box 3: [pc 4]
 After "ot=9":
 Box 0: [rn 1] [cm 2]
 Box 3: [pc 4] [ot 9]
 After "ab=5":
 Box 0: [rn 1] [cm 2]
 Box 3: [pc 4] [ot 9] [ab 5]
 After "pc-":
 Box 0: [rn 1] [cm 2]
 Box 3: [ot 9] [ab 5]
 After "pc=6":
 Box 0: [rn 1] [cm 2]
 Box 3: [ot 9] [ab 5] [pc 6]
 After "ot=7":
 Box 0: [rn 1] [cm 2]
 Box 3: [ot 7] [ab 5] [pc 6]
 All 256 boxes are always present; only the boxes that contain any lenses are shown here. Within each box, lenses are listed from front to back; each lens is shown as its label and focal length in square brackets.
 To confirm that all of the lenses are installed correctly, add up the focusing power of all of the lenses. The focusing power of a single lens is the result of multiplying together:
    One plus the box number of the lens in question.
    The slot number of the lens within the box: 1 for the first lens, 2 for the second lens, and so on.
    The focal length of the lens.
 At the end of the above example, the focusing power of each lens is as follows:
    rn: 1 (box 0) * 1 (first slot) * 1 (focal length) = 1
    cm: 1 (box 0) * 2 (second slot) * 2 (focal length) = 4
    ot: 4 (box 3) * 1 (first slot) * 7 (focal length) = 28
    ab: 4 (box 3) * 2 (second slot) * 5 (focal length) = 40
    pc: 4 (box 3) * 3 (third slot) * 6 (focal length) = 72
 So, the above example ends up with a total focusing power of 145.
 With the help of an over-enthusiastic reindeer in a hard hat, follow the initialization sequence. What is the focusing power of the resulting lens configuration?
 Your puzzle answer was 239484.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,47 @@
 #!/usr/bin/env python3
 import sys, re
 def HASH(string):
    res = 0
    for a in string:
        res += ord(a)
        res = res * 17 % 256
    return res
 if __name__ == '__main__':
    instr = open(sys.argv[1]).read().strip('\n').split(',')
    # challenge 1
    res1 = sum([HASH(a) for a in instr])
    boxes = {}
    for i in instr:
        label, op, focus = re.findall(r'(\w+)(\-|\=)(\d*)', i)[0]
        box = HASH(label)
        if not box in boxes.keys(): boxes[box] = []
        present = boxes[box]
        if op == '=':
            for i, lens in enumerate(present):
                if lens[0] == label: present[i] = (label, int(focus)) 
            if not (label, int(focus)) in present: present.append((label, int(focus)))
        elif op == '-':
            for i, lens in enumerate(present):
                if lens[0] == label:
                    present.remove(lens)
                    break
    res2 = 0
    for b, lenses in boxes.items():
        for i,l in enumerate(lenses):
            res2 += (b+1) * (i+1) * l[1]
    res1 = str(res1)
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    res2 = str(res2)
    print(f"challenge 2:\n{res2}\n")
@@ -0,0 +1 @@
 rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7
@@ -0,0 +1 @@
 fzl-,tcjp=8,vkjr=9,xs-,jktcpk=3,gzp-,kfsxsd-,zxkv=7,fxz-,pj=7,mhbdch=7,xlss-,smk-,ppz-,kqggd-,dqh=7,gmv=6,tjjfm=2,gbv=5,gn-,ld=7,jdr-,phq=3,rd-,qz=3,sh-,gzsb=2,glrt=7,vjkrjg-,gjqmpc=7,qnx=7,mf=1,tnrm-,lppg-,gnvx=1,rv-,vnt-,bst-,gkb-,tl=1,bggff-,lm=8,mqq=7,hr-,gkb-,fspkn=2,tjjfm-,shshb=3,qfczq-,zk-,zcsc-,lnrjh=2,fz-,bkb-,rg-,bcfzn=6,xsbb=5,sm=3,rqs-,rvlv=9,pvh=9,rl-,zrb=9,lftk=1,cdn-,zp=8,hc-,mf-,hp-,zk-,dbj=5,tm=9,zx-,gmp=4,gcq-,mxq-,lvh-,lkhb-,vn=9,gzsb=6,xlss=9,drkhc=8,rgqg=1,hkr-,fxz=7,xsm-,fvmf=4,hsm=7,dlrss=9,rv-,kj-,ndtc-,zjf-,zj=9,kv=5,sxvv-,hj-,mltm-,qggz-,mntr-,td=5,lppg=1,xqb-,brt-,nm-,vlp=7,zcjnv=6,chh-,dd=2,fh-,hxfkx=6,hj=6,rzk=7,skpq-,rxb=1,fn=1,nc=1,vqq-,ndq-,xtgd=6,qlgv-,dl-,xln-,rqs=5,vpmmf=1,llvv-,hzp=6,dnbql=3,rqz=5,nfhb=7,vdb-,gmp-,hskv-,xs-,vk-,xll-,ng=2,xb-,mjjph-,tss-,lsd-,qsj-,tbdb-,tdnm=6,bv-,qz=5,zp=8,jn-,fh-,dqh=1,rgrd=5,kqggd-,ddccc-,gdx=3,br-,cnb=4,tfx-,scp=5,rgch-,xltvn=4,xdblmh-,jdr-,fz-,crd-,hfr-,xlss=2,fxz=5,rzl-,vdb-,tss=6,kc=2,bdmrg=6,mkv-,hdr=9,pv-,qcr=4,ntxqq-,mhbdch=8,npghs-,jb-,lzcp=1,zbl-,vsjs-,dmv=1,zhc-,tfx-,jc=8,vlhhb-,zcbg=2,fcbzpl=8,gkb-,zppn-,jj=6,xlc=6,xltvn-,cnb-,lftk-,ptmc-,fxz=6,ncn-,gzp-,lgtd=4,znp-,ncn=8,fg-,lnrjh=6,lkhb-,tnrm=4,hkr-,ltc-,lv-,ck-,dn=5,srt-,hk-,fspkn=9,drnvhj=5,gvf-,gzp-,pq-,lbq=8,lm-,lsx-,jf-,vkjr-,lcvzfp-,vqqp-,glrt=7,zx=4,hskv=9,bqm=6,jm=6,tshhq=7,sg-,pq-,rgqg=4,bcpb-,df=4,qpqx=6,fn=7,drnvhj=5,vf=8,zsx-,jbd-,kczn=9,fspkn=1,cjd=5,hzp=1,zpkc-,kczn=7,mrd=9,ndq-,hp=4,nfmf-,npghs-,zvd=9,dt=2,jdf=2,xzq-,xb=7,cpbb-,nd-,sgq=2,fc=1,tdnm-,fvmf-,ncn=4,zrdk=1,bvb-,gmp=2,pvh=2,klzj=7,lqlh-,tgm-,vf-,xll=3,lcvzfp=4,jrp=1,jq-,cjd-,nxqhqd=9,lx=4,ltc-,kc=9,gddghs=4,lj=9,bggff=8,pxk-,glgpxh-,mrd=6,mhkbd=1,lbq-,rgch-,vf-,ks=8,dt=5,tb=2,cdn=3,vlxv=6,rgrd-,mcfh=9,bkg-,fd-,bdz=4,vk=7,phd=4,bkg-,krz=6,flk=1,jf=8,zxkv=2,hdhk-,nxqhqd-,dvgz=7,dbj-,rvc-,fshfd=7,tb=4,mjx-,vnsgg=1,zppn=6,zx-,kk=2,xs-,xprp=7,hh=9,xnp=8,vndj=9,qnzlf=3,bdmrg-,dxl=5,ss=4,clv-,hk=3,kgx-,qqvmc=9,xzq-,kfsxsd-,bdt-,vqq-,lqlh-,jvp=7,tshhq=5,pvh=4,cp=4,bpd-,bqql-,dvx=8,qtql=7,zxkv=3,qfv-,xlss-,lzs-,kt=3,ltsb-,pfs=2,dmv-,qcr-,sl-,qsjch-,hmd-,bcpb-,drnvhj=4,bf=3,qx=1,gddghs-,zcjnv-,bdmrg-,rd-,ddccc=2,hvk=6,kk=1,chh=5,mxq=9,kcq-,vkjr-,ntxqq-,glgpxh=6,dvzlc-,lnt=2,rkk-,mzpgh=7,pl-,vndj-,nc-,xx=5,klzj=2,xhs-,cx-,jz=7,rmh=7,gjqmpc-,zdr=4,csqh-,zppn-,zc-,bvb=4,tjjfm-,rdzzjm=8,dbj-,sr=4,npghs=1,pxs-,blxq-,rqz=1,grxx-,sg-,fqmdgn-,jf-,pqjf-,xzljl=9,zdr-,hh-,cnb=5,jrq=1,dvx=2,pzbsd-,xpm=5,znp-,gqsr=2,qtql-,kssg=4,qm=3,scd=1,lzcp=4,gdx=9,shshb=2,sxmq=2,mtqb-,xn-,xln=4,vv-,nj-,tjjfm=7,rp=5,kcq=3,bcfzn-,dbj=9,zcbg-,bfx-,gvf=2,ptmc=7,jb=7,kv-,znl=5,gsk-,zjf=8,kmx-,rbft=1,csqh-,zp-,rq=1,rrx=9,mh=2,gnvx=9,mqq=9,bqql=6,gj=2,mhv=3,dcc-,kgx-,vhrd=6,ztj=2,ng-,rl-,bqm=1,rgqg=6,blmgvg=5,jx-,vqqp=8,jb-,lnk=2,rvlv=9,tz-,hj-,ltc=7,gcjgs=7,tm=2,mn=4,ss=7,vlhhb=4,hkd-,xf-,ltsb-,rzl=7,zx=5,phq=8,srt-,jvp=5,sgq-,qnzlf=9,lsd-,fbrz-,dsnd=3,hj-,tcjp-,vnsgg=9,xn-,mzpgh-,sxvv-,gjqmpc-,ncn-,mqq=2,tmpd-,rkk=6,qrlrxg-,csnq-,ltsb=6,pq-,mjx=6,bkc-,bvb-,kgpnf=2,xv=7,cjd=6,hp=3,vf-,pg-,jnq=2,tnng=7,qq-,dxl=5,nfpqv-,rg=9,dmv-,gd-,rgch-,nfpqv=9,gjqmpc=6,sgq-,cjd-,qnn-,ztj-,gn-,jqhg-,pzbsd-,qjn-,gggk=6,mntr=8,sxvv=3,jtx-,krz-,lzs-,pvh-,rrx=1,kgpnf-,bkg-,krz=4,vpmmf=8,rm=5,jr-,lx-,hbsv=1,pq=4,txs=9,mltm=3,sr=1,hr=8,dqh-,rm-,vdb=8,hdhk-,fzx-,xpm=1,hkr=1,qx=3,xn=1,zjf-,bpd=7,vxb=4,mcfh-,dcc=7,sgq-,vpmmf-,zcsc-,gggk=2,hr-,sgq-,tmpd-,rbft-,xm-,pqjf=6,vnt-,hmd-,vg-,sv-,bqm-,dsnd=2,hbq-,zc-,fxjc-,vsjs-,xv-,jqhg=2,bqm=6,qtz-,rxb-,mjx=3,br=8,hp-,bf=8,hbq-,lnrjh=3,xb=9,cdf=4,pm-,xlc-,tm=8,jrq=1,hq-,kqggd-,dhh-,tf-,nxqhqd-,qpqx=9,vpmmf=8,kgx-,glgpxh=2,rzl=1,qtz-,rl=5,sb=5,lfz-,bcpb-,xsdlmd=8,fshfd-,vlkx-,ss=3,xs=2,mn=5,dl-,lzcp=8,bqql=3,nd=4,lsx-,znl-,ltc=1,qggz-,zrb-,tbdb=4,drkhc=7,dkvqm-,tz-,hvk-,ld=5,mjx-,bl=5,qx=2,zppn=7,rgrd=1,bpd=7,bdmrg-,rl-,rqz=7,kc=1,gzp-,kcx=6,kmx-,rxptm=4,rrn=4,mhv=4,zjf-,blmgvg-,csnq-,ttgzdn-,ptmc=6,jq-,rxptm=8,mtqb=5,bpt=7,pxs-,cx=7,cz-,mn-,qfv=5,kgv=2,xv-,blmgvg-,cp=4,hq-,vlp-,xnp-,hh-,lbrn-,crd=3,jc=2,sr=9,vkxm-,mtqb-,sf=3,sv-,hfdzfc-,gbv=3,xsdlmd=9,nst=2,kf-,vn=4,nfhb=8,gkb-,rvlv-,drqq=5,kx=9,hp=8,dh=3,hbq-,pfxqhx=9,zx=9,jc-,zjttq-,vc-,lnk=6,tnrm=8,nxz=1,lcvzfp-,dnbql=6,xs-,tshhq-,kgv-,dvgz-,zhg=8,ksm-,kt=4,jqhg=8,xpllk-,fspkn=6,fc=3,rbft-,scp=5,hk-,hbsv-,drqq=8,kv=6,zlt=6,sxmq=8,qz=9,brt-,smr-,zsx=2,jvp-,vxcfp-,sf-,zhg=1,rmh=8,ztj=9,tb-,jdf-,xb=6,fvmf=5,vqq-,lm-,rlx-,zjttq-,lzcp-,fd-,vkjr=7,hj-,qnn=1,rv-,tb=9,sfrd=7,dhh-,smk=3,xb-,glms=3,jgmsl-,xzq-,mmx=8,zcbg-,pxs=8,cz-,ksm-,skpq-,rrn-,td-,hfr=4,pq-,vt-,krz-,crd-,dnbql=2,mmx=3,rq-,tgm-,fbrz=7,xm-,rv=1,sv-,nfmf-,pptj=7,kgpnf-,cnd=1,vdb-,sb-,pzbsd-,pqc=3,mf=3,rm=7,cjd-,tnng-,mcfh-,fvmf=5,qsjch=5,dt-,hmd=2,hkd-,hvhd=7,nm=3,mpd-,gsk=1,cbnq=2,sl=8,zhc=8,xnp=7,jrq=8,xzljl=1,ht-,tcjp=4,jgmsl=6,vn-,fqmdgn-,xln=4,tfx-,kfjgqb-,pv=3,dz=5,dj-,bpd=9,rqz=1,cc-,nxqhqd-,kkz=4,drqq=8,rzk=9,skk-,tz=4,nfpqv=4,kfsxsd-,pxk-,hk-,nxqhqd=7,rdzzjm=3,dz-,xx=5,sb=6,phd-,cnk-,zqvb-,rzl-,hxfkx=9,llb=3,sr-,gsk=7,bfx-,dmv-,qm-,lf-,jrq=3,hp=2,scp=7,mcfh=7,lnrjh=8,fvmf=2,hvk-,sv-,drnvhj-,jbd=2,hdLine truncated
@@ -0,0 +1,62 @@
 #!/usr/bin/env python3
 import sys
 ENERGY = []
 # direction given as tuple, e.g., (1,0) for right
 def move_beam(x,y,d,grid):
    while True:
        if (x > len(grid[0])-1) or (x < 0) or (y > len(grid)-1) or (y < 0): break
        if d in ENERGY[x+y*len(grid[0])]: break
        ENERGY[x+y*len(grid[0])].append(d)
        tile = grid[y][x]
        if tile == '.':
            x, y = x+d[0], y+d[1]
        elif (tile == '-' and d[1] == 0) or (tile == '|' and d[0] == 0):
            x,y = x+d[0], y+d[1]
        elif tile == '\\':
            d = (d[1],d[0])
            x,y = x+d[0], y+d[1]
        elif tile == '/':
            d = (-d[1],-d[0])
            x,y = x+d[0], y+d[1]
        elif tile == '-':
            move_beam(x-1, y, (-1,0), grid)
            move_beam(x+1, y, (1,0), grid)
        elif tile == '|':
            move_beam(x, y-1, (0,-1), grid)
            move_beam(x, y+1, (0,1), grid)
 def energize(x,y,d,grid):
    global ENERGY
    ENERGY = []
    for i in range(len(grid) * len(grid[0])):
        ENERGY.append([])
    move_beam(x,y,d,grid)
    return len(ENERGY) - ENERGY.count([])
 if __name__ == '__main__':
    grid = [list(line.strip('\n')) for line in open(sys.argv[1])]
    res2 = 0
    for i in range(len(grid)):
        res2 = max(energize(0,i,(1,0),grid),res2)
    for i in range(len(grid[0])):
        res2 = max(energize(i,0,(0,1),grid),res2)
    for i in range(len(grid)):
        res2 = max(energize(len(grid)-1,i,(-1,0),grid),res2)
    for i in range(len(grid[0])):
        res2 = max(energize(i,len(grid[0])-1,(0,-1),grid),res2)
    # challenge 1
    res1 = str(energize(0,0,(1,0),grid))
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    res2 = str(res2)
    print(f"challenge 2:\n{res2}\n")
@@ -0,0 +1,10 @@
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@@ -0,0 +1,110 @@
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@@ -0,0 +1,78 @@
 --- Day 1: Historian Hysteria ---
 The Chief Historian is always present for the big Christmas sleigh launch, but nobody has seen him in months! Last anyone heard, he was visiting locations that are historically significant to the North Pole; a group of Senior Historians has asked you to accompany them as they check the places they think he was most likely to visit.
 As each location is checked, they will mark it on their list with a star. They figure the Chief Historian must be in one of the first fifty places they'll look, so in order to save Christmas, you need to help them get fifty stars on their list before Santa takes off on December 25th.
 Collect stars by solving puzzles. Two puzzles will be made available on each day in the Advent calendar; the second puzzle is unlocked when you complete the first. Each puzzle grants one star. Good luck!
 You haven't even left yet and the group of Elvish Senior Historians has already hit a problem: their list of locations to check is currently empty. Eventually, someone decides that the best place to check first would be the Chief Historian's office.
 Upon pouring into the office, everyone confirms that the Chief Historian is indeed nowhere to be found. Instead, the Elves discover an assortment of notes and lists of historically significant locations! This seems to be the planning the Chief Historian was doing before he left. Perhaps these notes can be used to determine which locations to search?
 Throughout the Chief's office, the historically significant locations are listed not by name but by a unique number called the location ID. To make sure they don't miss anything, The Historians split into two groups, each searching the office and trying to create their own complete list of location IDs.
 There's just one problem: by holding the two lists up side by side (your puzzle input), it quickly becomes clear that the lists aren't very similar. Maybe you can help The Historians reconcile their lists?
 For example:
 3   4
 4   3
 2   5
 1   3
 3   9
 3   3
 Maybe the lists are only off by a small amount! To find out, pair up the numbers and measure how far apart they are. Pair up the smallest number in the left list with the smallest number in the right list, then the second-smallest left number with the second-smallest right number, and so on.
 Within each pair, figure out how far apart the two numbers are; you'll need to add up all of those distances. For example, if you pair up a 3 from the left list with a 7 from the right list, the distance apart is 4; if you pair up a 9 with a 3, the distance apart is 6.
 In the example list above, the pairs and distances would be as follows:
    The smallest number in the left list is 1, and the smallest number in the right list is 3. The distance between them is 2.
    The second-smallest number in the left list is 2, and the second-smallest number in the right list is another 3. The distance between them is 1.
    The third-smallest number in both lists is 3, so the distance between them is 0.
    The next numbers to pair up are 3 and 4, a distance of 1.
    The fifth-smallest numbers in each list are 3 and 5, a distance of 2.
    Finally, the largest number in the left list is 4, while the largest number in the right list is 9; these are a distance 5 apart.
 To find the total distance between the left list and the right list, add up the distances between all of the pairs you found. In the example above, this is 2 + 1 + 0 + 1 + 2 + 5, a total distance of 11!
 Your actual left and right lists contain many location IDs. What is the total distance between your lists?
 Your puzzle answer was 1660292.
 --- Part Two ---
 Your analysis only confirmed what everyone feared: the two lists of location IDs are indeed very different.
 Or are they?
 The Historians can't agree on which group made the mistakes or how to read most of the Chief's handwriting, but in the commotion you notice an interesting detail: a lot of location IDs appear in both lists! Maybe the other numbers aren't location IDs at all but rather misinterpreted handwriting.
 This time, you'll need to figure out exactly how often each number from the left list appears in the right list. Calculate a total similarity score by adding up each number in the left list after multiplying it by the number of times that number appears in the right list.
 Here are the same example lists again:
 3   4
 4   3
 2   5
 1   3
 3   9
 3   3
 For these example lists, here is the process of finding the similarity score:
    The first number in the left list is 3. It appears in the right list three times, so the similarity score increases by 3 * 3 = 9.
    The second number in the left list is 4. It appears in the right list once, so the similarity score increases by 4 * 1 = 4.
    The third number in the left list is 2. It does not appear in the right list, so the similarity score does not increase (2 * 0 = 0).
    The fourth number, 1, also does not appear in the right list.
    The fifth number, 3, appears in the right list three times; the similarity score increases by 9.
    The last number, 3, appears in the right list three times; the similarity score again increases by 9.
 So, for these example lists, the similarity score at the end of this process is 31 (9 + 4 + 0 + 0 + 9 + 9).
 Once again consider your left and right lists. What is their similarity score?
 Your puzzle answer was 22776016.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,24 @@
 #!/usr/bin/env python3
 import sys
 if __name__ == '__main__':
    tuples = [[int(l) for l in line.strip('\n').split('   ')] for line in open(sys.argv[1])]
    first, second = [sorted(a) for a in zip(*tuples)]
            # first = []
            # second = []
            # for line in lines:
            #     f, s = line.split('   ')
            #     first.append(int(f))
            #     second.append(int(s))
            # first.sort()
            # second.sort()
    # challenge 1
    res1 = sum([abs(x-y) for (x,y) in zip(first, second)])
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    res2 = sum([x * second.count(x) for x in first])
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,1000 @@
 15244   50562
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@@ -0,0 +1,62 @@
 --- Day 2: Red-Nosed Reports ---
 Fortunately, the first location The Historians want to search isn't a long walk from the Chief Historian's office.
 While the Red-Nosed Reindeer nuclear fusion/fission plant appears to contain no sign of the Chief Historian, the engineers there run up to you as soon as they see you. Apparently, they still talk about the time Rudolph was saved through molecular synthesis from a single electron.
 They're quick to add that - since you're already here - they'd really appreciate your help analyzing some unusual data from the Red-Nosed reactor. You turn to check if The Historians are waiting for you, but they seem to have already divided into groups that are currently searching every corner of the facility. You offer to help with the unusual data.
 The unusual data (your puzzle input) consists of many reports, one report per line. Each report is a list of numbers called levels that are separated by spaces. For example:
 7 6 4 2 1
 1 2 7 8 9
 9 7 6 2 1
 1 3 2 4 5
 8 6 4 4 1
 1 3 6 7 9
 This example data contains six reports each containing five levels.
 The engineers are trying to figure out which reports are safe. The Red-Nosed reactor safety systems can only tolerate levels that are either gradually increasing or gradually decreasing. So, a report only counts as safe if both of the following are true:
    The levels are either all increasing or all decreasing.
    Any two adjacent levels differ by at least one and at most three.
 In the example above, the reports can be found safe or unsafe by checking those rules:
    7 6 4 2 1: Safe because the levels are all decreasing by 1 or 2.
    1 2 7 8 9: Unsafe because 2 7 is an increase of 5.
    9 7 6 2 1: Unsafe because 6 2 is a decrease of 4.
    1 3 2 4 5: Unsafe because 1 3 is increasing but 3 2 is decreasing.
    8 6 4 4 1: Unsafe because 4 4 is neither an increase or a decrease.
    1 3 6 7 9: Safe because the levels are all increasing by 1, 2, or 3.
 So, in this example, 2 reports are safe.
 Analyze the unusual data from the engineers. How many reports are safe?
 Your puzzle answer was 624.
 --- Part Two ---
 The engineers are surprised by the low number of safe reports until they realize they forgot to tell you about the Problem Dampener.
 The Problem Dampener is a reactor-mounted module that lets the reactor safety systems tolerate a single bad level in what would otherwise be a safe report. It's like the bad level never happened!
 Now, the same rules apply as before, except if removing a single level from an unsafe report would make it safe, the report instead counts as safe.
 More of the above example's reports are now safe:
    7 6 4 2 1: Safe without removing any level.
    1 2 7 8 9: Unsafe regardless of which level is removed.
    9 7 6 2 1: Unsafe regardless of which level is removed.
    1 3 2 4 5: Safe by removing the second level, 3.
    8 6 4 4 1: Safe by removing the third level, 4.
    1 3 6 7 9: Safe without removing any level.
 Thanks to the Problem Dampener, 4 reports are actually safe!
 Update your analysis by handling situations where the Problem Dampener can remove a single level from unsafe reports. How many reports are now safe?
 Your puzzle answer was 658.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,36 @@
 #!/usr/bin/env python3
 import sys
 def safe(report):
    if report == sorted(report) or report == sorted(report, reverse=True):
        start = report[0]
        for l in report[1:]:
            if 1 > abs(l-start) or 3 < abs(l-start): return False
            start = l
        return True
    return False
 if __name__ == '__main__':
    reports = [[int(x) for x in line.strip('\n').split(' ')] for line in open(sys.argv[1])]
    # challenge 1
    saferep = sum([safe(r) for r in reports])
    res1 = saferep
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    for r in reports:
        if not safe(r):
            tolerate = False
            for i in range(len(r)):
                r1 = r[0:i] + r[i+1:len(r)]
                if safe(r1):
                    tolerate = True
                    break
            saferep += tolerate
    res2 = saferep
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,6 @@
 7 6 4 2 1
 1 2 7 8 9
 9 7 6 2 1
 1 3 2 4 5
 8 6 4 4 1
 1 3 6 7 9
@@ -0,0 +1,1000 @@
 31 34 36 38 40 43 46 44
 67 68 70 72 74 77 79 79
 32 35 36 38 42
 18 21 22 24 27 30 35
 63 66 67 66 69 72
 63 64 67 64 65 67 64
 35 36 38 41 38 40 42 42
 59 62 63 64 66 64 67 71
 55 57 55 56 61
 58 60 62 62 65 67 68
 84 86 89 91 93 94 94 91
 32 34 36 36 37 39 41 41
 13 15 18 19 19 21 22 26
 61 64 64 67 68 74
 56 57 58 61 65 66 68
 53 56 57 61 62 64 62
 78 80 84 85 85
 38 39 41 45 47 51
 2 5 8 9 12 16 18 24
 50 51 53 55 60 61
 31 32 37 39 40 42 40
 46 48 53 54 54
 40 43 45 51 55
 31 32 35 37 44 45 51
 15 12 15 18 20 23 25 27
 78 76 79 80 78
 46 45 48 49 52 54 54
 17 16 17 20 24
 80 78 80 82 83 90
 48 47 44 46 48
 62 60 59 62 61
 26 23 24 26 24 26 28 28
 4 3 1 4 5 7 9 13
 48 45 43 45 47 52
 93 90 92 95 95 98
 80 79 81 81 83 84 83
 6 4 4 6 8 8
 8 5 6 9 12 12 16
 42 41 41 44 45 47 54
 66 63 64 68 70 73
 45 43 44 46 50 49
 5 4 7 11 12 14 14
 72 71 75 78 80 84
 79 77 79 82 83 87 88 93
 75 74 76 77 84 85
 26 25 28 30 36 39 38
 26 25 26 32 32
 49 47 50 53 60 61 65
 18 16 17 18 23 29
 73 73 74 75 78
 43 43 46 47 49 50 51 50
 87 87 89 90 93 93
 52 52 55 58 62
 78 78 81 82 83 85 91
 48 48 46 49 51
 89 89 92 93 91 92 95 94
 13 13 15 14 16 19 19
 68 68 65 66 68 72
 39 39 37 38 39 46
 23 23 25 25 26 29
 90 90 93 94 94 95 98 96
 26 26 27 30 30 31 32 32
 61 61 64 66 66 70
 34 34 34 36 41
 35 35 37 39 40 44 45
 70 70 74 77 79 82 84 82
 16 16 19 23 26 28 29 29
 41 41 42 46 50
 33 33 34 38 40 46
 28 28 29 36 39
 79 79 85 87 88 90 89
 66 66 69 72 77 77
 49 49 51 52 59 63
 38 38 40 42 49 56
 78 82 84 86 88 90 91
 41 45 48 50 52 49
 60 64 67 68 69 72 75 75
 78 82 83 85 89
 33 37 40 42 48
 78 82 85 87 89 87 88 89
 2 6 5 6 7 9 7
 1 5 3 5 6 8 8
 81 85 83 84 86 90
 65 69 67 68 69 72 74 81
 15 19 21 24 26 26 28
 4 8 11 14 14 16 15
 9 13 14 14 17 17
 15 19 20 20 22 26
 9 13 15 16 16 22
 16 20 23 27 30
 18 22 25 29 31 29
 1 5 6 8 10 13 17 17
 9 13 17 20 22 26
 28 32 33 37 40 46
 30 34 36 38 40 47 50
 44 48 54 57 59 60 61 58
 9 13 16 22 22
 62 66 68 71 77 81
 36 40 42 49 54
 43 50 53 55 56 58 60 63
 5 10 11 13 10
 5 11 12 15 17 19 19
 34 39 40 43 47
 50 57 59 60 61 63 70
 38 43 44 43 46 48 51
 79 85 88 85 87 86
 72 78 79 76 78 80 81 81
 42 48 47 48 52
 55 62 63 66 68 65 70
 47 54 55 55 58 59 60
 79 85 87 87 89 88
 7 14 17 20 23 24 24 24
 68 73 75 75 76 77 79 83
 9 16 19 19 24
 66 72 73 77 79
 12 18 22 23 24 23
 26 32 33 36 38 42 44 44
 30 37 39 43 46 50
 66 73 74 75 79 86
 47 53 58 60 62
 46 53 59 62 59
 56 61 63 66 68 75 76 76
 23 29 32 34 39 40 44
 33 40 41 43 48 49 56
 13 12 11 9 11
 41 38 35 33 33
 99 96 94 93 90 88 84
 20 19 17 16 13 7
 80 79 78 75 72 70 71 70
 88 87 88 86 85 83 84
 44 42 41 44 43 43
 23 20 17 18 15 14 10
 22 19 18 19 12
 17 16 16 13 12 9
 38 36 36 35 32 31 34
 41 40 40 39 38 37 35 35
 63 61 59 58 56 56 53 49
 30 27 26 26 21
 47 45 41 38 37
 48 46 45 41 43
 27 26 24 20 19 19
 17 14 10 7 3
 66 64 60 57 52
 82 81 78 73 70 68 65
 93 90 87 84 82 75 77
 83 81 80 73 73
 41 38 32 29 25
 50 49 48 41 36
 83 86 83 81 78 75
 39 41 39 37 36 37
 39 41 39 37 37
 61 62 59 58 57 54 50
 61 62 59 57 51
 72 73 72 71 74 73
 90 92 93 91 88 87 88
 31 33 30 31 28 25 25
 74 75 73 72 71 70 73 69
 78 81 78 79 78 71
 66 69 69 66 63 61 60 57
 7 9 6 5 5 7
 51 53 52 52 51 51
 90 92 89 86 86 84 80
 88 91 91 90 89 83
 52 55 54 50 48 46 45 44
 87 90 88 86 82 81 78 81
 46 49 48 45 41 38 38
 41 42 38 37 33
 90 93 91 90 88 84 81 76
 52 54 52 46 43 42
 43 46 43 36 38
 12 14 11 10 8 7 2 2
 29 30 23 22 21 17
 68 71 65 64 61 59 56 51
 99 99 97 94 93 90
 46 46 45 44 47
 65 65 62 60 59 57 54 54
 90 90 87 86 84 81 80 76
 22 22 20 19 18 17 10
 56 56 55 53 55 54 51 49
 46 46 47 44 45
 94 94 95 92 90 90
 51 51 54 51 47
 64 64 62 64 62 60 55
 99 99 97 96 96 93 90 89
 70 70 70 68 66 64 66
 91 91 89 87 84 84 83 83
 92 92 92 91 89 85
 11 11 8 8 6 1
 81 81 80 76 73 70
 56 56 54 50 48 45 43 45
 72 72 69 68 64 61 59 59
 80 80 77 73 69
 61 61 59 55 49
 24 24 21 20 15 14 12 9
 38 38 35 32 26 28
 53 53 52 51 49 42 42
 60 60 54 52 51 50 46
 42 42 39 36 34 27 20
 16 12 11 8 7 4
 34 30 28 27 25 22 25
 94 90 88 87 84 84
 84 80 77 76 75 74 70
 65 61 59 58 57 55 49
 72 68 71 68 65 64
 75 71 70 71 70 71
 97 93 91 88 85 87 86 86
 29 25 23 26 22
 92 88 86 89 86 83 80 75
 85 81 79 78 78 77 75 73
 80 76 75 75 72 69 72
 59 55 52 52 49 49
 60 56 56 54 50
 75 71 71 70 67 60
 81 77 76 72 70
 36 32 31 27 29
 86 82 79 77 73 71 71
 56 52 49 45 41
 94 90 86 85 80
 95 91 88 87 84 78 76
 63 59 56 55 54 47 49
 63 59 56 54 48 48
 70 66 59 57 55 53 49
 24 20 18 15 8 7 6 1
 61 54 51 50 47 46
 31 25 23 21 19 16 15 17
 89 82 80 77 77
 58 53 51 48 44
 63 56 55 52 50 47 45 38
 58 52 50 52 50 47 45
 86 79 80 79 82
 70 63 61 60 63 63
 54 48 47 45 46 42
 58 53 52 54 52 45
 54 47 44 41 39 39 36 33
 56 51 50 50 49 47 49
 79 73 73 70 69 69
 80 73 72 71 71 69 67 63
 70 63 62 60 59 58 58 52
 21 15 12 9 6 2 1
 42 35 33 29 31
 36 30 26 23 23
 30 23 22 21 18 16 12 8
 29 24 20 17 14 9
 47 42 36 34 33
 99 93 90 89 82 81 78 81
 29 22 17 16 16
 59 53 52 50 48 46 40 36
 97 92 85 82 81 79 78 71
 52 57 60 61 62 64 70 73
 14 13 11 10 9 7 5 1
 42 44 47 50 53 57 60 64
 34 27 27 25 25
 92 90 90 92 99
 73 75 76 78 82 85 87 85
 23 19 21 18 16 14 8
 21 26 27 28 30 27 33
 26 23 24 27 31 32 31
 30 31 33 32 29 28 26 26
 42 44 45 46 46 48 49 55
 45 49 52 53 55 60
 22 26 28 31 32 35 37
 47 47 46 42 42
 61 61 60 62 61 58 56 50
 15 15 15 18 21 19
 28 26 22 19 12
 23 29 30 33 30 32 35 39
 20 20 17 16 13 9 7 2
 76 72 71 70 67 65 59 55
 78 81 81 82 83
 35 40 42 44 47 49 49
 87 83 86 83 82 82
 37 32 30 27 24 20 20
 21 21 23 21 28
 41 39 40 42 45 48 51 51
 74 74 73 70 68 67 65
 84 85 84 82 80 76
 45 45 39 38 38
 47 43 43 41 38 31
 33 33 32 29 22 21 15
 31 37 40 40 47
 62 62 63 65 67 68 69
 70 67 64 63 61 62 57
 39 34 33 30 29 26 26 19
 63 63 64 66 66 68 69 71
 38 45 48 51 50
 53 59 63 66 65
 59 59 56 56 55 56
 71 67 66 64 60
 48 50 57 60 60
 73 73 75 76 76 77 77
 62 62 63 70 71
 45 41 38 34 33 31 29 26
 85 85 88 89 92 89 92 90
 64 61 60 59 56 53 48
 49 47 48 51 53 53 53
 17 16 13 15 16 18 18
 56 57 58 62 65 72
 13 13 18 20 20
 76 72 67 66 64 58
 4 11 12 13 15 19 19
 32 28 27 24 21 14 11 11
 11 11 10 10 6
 42 42 44 45 47 53 56 60
 96 95 94 93 91 91 89 87
 77 80 77 75 74 72
 41 45 49 52 55 56 59
 30 35 36 37 38 38 41
 69 72 73 76 78 80 80 84
 78 74 71 69 68 64 66
 21 16 12 10 6
 94 90 86 83 83
 81 85 88 89 90 88
 43 45 43 39 37 33
 99 95 94 91 94
 57 57 54 52 50 47 45 39
 24 25 23 22 15 14 14
 88 84 83 80 79 76 74 74
 98 94 92 90 89 85 80
 37 37 38 41 44 44
 95 96 96 93 92 85
 6 6 7 9 15 17 16
 68 71 78 80 81 85
 35 37 39 40 41 42 43 43
 30 34 37 40 41 45 45
 9 13 15 15 16 19 22 26
 55 49 46 45 42 40 41
 76 72 68 67 63
 26 33 36 37 34 35
 51 44 41 39 41 39 35
 12 9 11 14 15 16 18 15
 42 42 45 45 46 48 49 56
 4 8 9 10 8 8
 17 15 18 19 21 22
 53 53 50 49 44 42 44
 8 12 16 18 20 24
 67 68 70 69 69
 56 49 44 43 42 40 43
 39 41 42 43 49 50
 39 37 40 43 44 49 53
 59 63 66 72 72
 44 44 47 48 49 52 56 56
 62 59 57 57 58
 83 83 81 78 77 73
 54 58 60 62 69 74
 37 35 35 32 26
 39 43 46 52 55
 31 27 24 22 21 20 18
 73 80 83 84 86 90
 67 69 67 67 64 63 61
 53 54 51 48 45 44 45
 34 34 35 36 38 40 37 37
 73 75 72 71 68 65 62 62
 39 46 52 53 55 52
 32 32 31 29 26 28 28
 6 9 12 10 7
 26 26 28 32 35 38 40 44
 67 70 67 65 58
 32 33 32 31 30 23 20
 17 16 16 13 9
 81 80 79 77 75 69 66
 22 21 21 22 24 26 29 33
 91 91 93 91 92
 28 28 29 31 32 33 32
 39 39 40 37 34
 9 9 9 8 5 3 1 1
 21 19 18 14 13 12 15
 58 54 51 50 48 48 45 41
 14 12 6 4 3 5
 19 22 22 19 16 17
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 94 94 90 88 84
 16 10 13 10 8 8
 60 53 50 53 55
 56 53 50 47 46 47 44 42
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 51 49 48 45 42 41 39 37
 44 43 42 41 38
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 17 14 11 8 6 5 2
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 68 66 64 61 60 57 56 55
 14 12 9 8 6 4 3
 78 76 73 70 67 66 63
 28 29 30 31 34 35 37
 32 31 29 27 26 23 22 19
 66 65 63 60 59 57 54
 10 11 13 16 17 19 22
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 53 50 49 46 43
 44 42 41 40 37
 32 35 36 39 41 44 45 48
 25 27 28 29 30 31
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 42 45 48 50 51 53 54
 22 20 19 16 13
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 18 16 15 13 12 10 7 4
 96 94 92 89 87 85 84 83
 38 41 44 46 49 52
 63 62 60 57 55 52 49 46
 51 52 55 58 61 64 67
 77 78 79 82 84 87
 58 61 62 63 65
 55 58 59 62 65 68 69 70
 29 28 25 23 22 20 18
 18 20 22 24 26 29 32
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 15 14 11 9 6
 72 71 68 67 66
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 71 72 73 76 77 79
 38 39 41 44 45 47 50 51
 65 62 61 59 56 53 51
 56 57 60 62 65
 34 37 39 42 44 47
 12 14 16 19 22 25
 19 17 16 15 14 12 10
 22 20 19 17 16 15 13 10
 82 79 78 77 74 71
 15 13 10 7 6 4
 56 58 59 61 63 65 66 69
 86 85 83 81 78 77 74
 75 74 71 69 67 65
 33 31 29 28 26 25 24 21
 58 60 62 63 65 68 71 74
 43 45 48 50 52
 15 17 20 23 24 25 26 29
 73 70 68 67 66 64 62
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 51 53 54 56 58
 9 11 14 17 19 22 23 26
 55 52 49 47 46
 9 11 13 15 17 18 20 21
 89 91 92 94 96 97 98
 58 59 60 61 64
 14 13 10 9 8
 30 33 36 39 41
 75 78 80 81 84 85 87
 40 42 43 45 46
 71 70 68 67 65
 21 23 25 28 31 33 34 36
 54 51 50 49 48
 61 64 67 70 73 74 75 78
 19 17 16 14 12 9 8 5
 22 24 27 28 30 32
 80 83 84 86 88 89 90
 95 93 90 89 88 85
 24 26 27 30 33 35 37
 96 93 90 89 87 85 82 81
 82 79 76 74 73 71 69 67
 77 74 71 69 67 65 64 61
 29 26 23 22 20 19 16 15
 72 69 66 63 61
 13 12 10 9 7 6 5
 15 18 21 22 24
 30 28 26 23 21 19 18
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 62 64 67 70 73 75 78 79
 47 46 45 42 41 40
 44 43 42 41 38 36
 52 50 49 47 44 41 38 36
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 69 66 65 63 61 59 56
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 39 40 43 45 48 51 52 55
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 86 89 90 91 93
 48 51 52 55 58 59 61 63
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 11 14 17 18 19 20 23 26
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 36 38 39 42 43 45 47 48
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 80 78 75 72 69
 72 70 67 65 62 61 59
 59 61 62 64 66
 8 11 12 14 17
 45 47 49 50 53 55 58 59
 51 50 48 47 46 43 42
 16 18 21 23 24 26
 21 20 19 16 15 12 11
 13 16 17 20 23 24 25
 94 92 91 90 89 86 83 80
 94 91 90 87 86 83 80
 17 14 12 11 8 7
 23 21 18 17 16
 76 75 74 72 71 70
 43 41 40 37 36
 32 34 35 36 39 40 43
 19 21 22 24 26 28
 13 14 16 17 19 22 24 26
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 63 62 60 58 56 55 52 51
 71 72 73 75 77 78
 40 42 43 46 48 50
 84 83 80 78 75 72 70
 28 31 32 34 37 39 40 42
 27 25 24 22 20
 79 77 75 73 72
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 85 86 88 90 93 96 97
 81 78 75 72 71
 14 17 20 23 26 28 30 31
 66 65 62 59 58 57 54 52
 54 56 58 61 64 66 67
 37 35 33 31 30 27 26
 75 73 70 68 67
 76 75 73 70 68
 25 28 29 31 33
 70 73 75 78 80 83 84
 42 41 40 38 36 34 33
 20 21 22 24 26 29 31
 24 21 19 17 14 11 9
 77 75 73 70 68 65 63
 55 54 51 50 48 47
 78 77 76 75 73 72 69 68
 29 27 24 21 20 19
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 91 94 95 96 97
 11 13 14 16 19 20 23
 63 64 66 68 70 71 74 76
 64 63 61 58 57 56 54 53
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 20 22 24 25 28 31 32
 46 49 52 54 56
 74 77 79 81 82 85 86 89
 45 47 50 53 54
 58 57 55 54 51 50
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 49 46 43 42 39 36 35
 75 72 71 70 69 68 65 64
 42 41 39 36 33 32 31
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 35 34 32 31 30
 76 73 71 68 67 65
 5 7 8 11 14
 26 28 29 30 32 33 34
 80 83 85 86 87 89
 19 18 16 14 13 10 7 4
 21 18 16 15 12 11
 64 67 70 72 75 76 79 80
 5 6 9 11 13
 87 85 82 80 77 75 72
 23 22 19 18 17 16 15
 51 50 47 44 41 38
 34 33 31 30 29 27
 39 36 33 30 27
 15 13 12 10 9 8
 27 28 31 33 35 36
 31 30 29 26 23 20 19
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 60 58 56 54 53 51 49 48
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 70 68 65 64 63 60
 61 63 66 69 72 75 77 78
 19 17 16 13 10 7
 51 50 47 45 44 42 41 40
 72 73 76 77 80 81
 69 68 65 64 62 60 58
 47 44 41 38 35
 33 30 27 24 22 20
 54 51 50 48 46 43
 96 95 94 93 91 88
 77 76 73 71 69
 2 3 5 7 9 10 12
 20 21 23 24 25 26 27
 28 26 25 23 21 20 18 17
 52 55 57 59 60 63 64
 37 35 32 29 26
 62 61 60 57 55 53 52 50
 80 82 83 86 87
 64 66 68 69 71 72
 22 19 16 14 13 11
 98 96 93 91 88
 22 25 27 28 31 32
 63 61 60 57 56 55 53 50
 13 10 8 6 4
 35 37 38 40 41 42 43
 95 94 93 90 88
 98 96 93 90 88 87
 39 40 43 44 45 48
 21 24 26 27 28 29
 31 34 36 39 40 41 42 43
 68 65 64 61 58
 47 49 52 54 57 60
 26 28 31 34 36 37 40 43
 82 84 86 89 91 93
 78 75 74 72 71 70
 43 46 49 50 52 53
 64 66 67 69 71
 1 4 7 9 10
 47 49 50 51 53 56
 54 53 52 49 46 43 42 40
 59 58 57 56 53
 29 28 26 23 20 18 15
 41 42 45 48 49 52 54 55
 30 32 34 37 40
 34 37 38 41 43 46 48 50
 18 20 23 25 26
 61 63 66 69 72 74 77
 34 37 40 42 45 48 49 51
 64 61 60 59 56 53 50
 71 68 66 63 61 58 55 53
 25 22 20 19 16 15 14
 25 22 21 19 18
 13 15 16 19 22 24 25
 53 54 56 58 60 62
 6 7 8 11 14 16
 61 60 59 58 56 54
 89 86 85 82 79 76 74 73
 19 21 23 26 28 30 31
 90 89 88 86 83
 68 69 71 72 74 75
 67 65 63 61 59
 13 11 9 7 6 5 4 3
 52 53 54 55 56 59
 82 80 77 76 74 73
 11 9 6 3 2
 59 60 62 64 65 67
 69 67 66 64 62
 65 67 68 71 74 75
 73 74 75 78 80 83 84 87
 96 93 91 88 85 83 81 80
 28 25 23 21 19 16
 61 62 63 66 67 70 73
 86 87 88 90 91
 69 66 63 61 59 58 56
 24 26 27 28 31 34 37
 15 16 18 20 22 23 24
 64 66 67 69 71 74 75 76
 77 76 75 73 70 68 66
 26 27 29 31 34 36
 95 94 93 92 90
 1 4 7 8 10 12 14
 66 64 62 60 58 56 55 54
 40 42 44 45 47 50 52 55
 16 17 18 20 22 24 26 29
 27 25 24 21 19 16 13
 99 96 95 93 91 89
 29 32 35 38 39 40 43
 96 94 92 91 88 85
 51 48 47 45 43
 37 35 34 31 28 27 25 23
 92 89 87 86 83
 69 71 74 77 80 83 85
 17 20 21 22 25 27 28 29
 15 16 18 19 21 22 23 26
 50 52 54 56 57 58 59 60
 63 60 57 54 53 50 47
 57 59 62 64 66 67 68
 82 81 79 76 74 73 71 69
 34 35 37 39 42
 81 83 86 89 90 92 95 98
 1 2 5 6 7 10
 57 55 52 51 50 48
 2 3 5 7 8 11 12 15
 14 11 10 8 5 4
 11 14 16 19 20
 73 76 78 79 81 84
 70 71 73 75 78 80 82
 24 27 28 31 34 37 38
 47 45 42 40 38 35 33
 30 29 27 26 23 22
 13 16 17 18 19 21
 58 55 52 51 48 46 45 42
 73 72 69 66 63 62 60 59
 21 19 16 15 12 11 9 8
 70 71 74 77 80
 57 58 59 60 61 62
 39 36 33 30 29 26 24
 36 35 33 30 28 25
 51 48 46 45 43 42
 69 70 73 74 77 79 80 83
 33 35 36 38 39 40 43
 48 47 46 45 44 42
 14 15 16 19 22 25 28
 76 79 82 85 88 89 90
 55 56 58 59 62 64
 1 4 6 7 9 10 12 15
 64 61 59 58 57 54
 30 29 27 25 24 22 20
 67 65 62 59 56 54
 70 69 68 65 64 63
 93 92 89 87 85
 26 25 22 21 19 16 14 13
 30 31 34 35 38 40 41 42
 33 35 37 38 41 44 46
 91 89 86 85 83 82
 59 62 65 67 70 73 75
 62 64 65 68 69 72 73
 19 22 23 26 28 29 32
 40 37 34 33 32 29 27
 34 36 39 41 44 46
 3 4 7 10 13 15 16 19
 74 72 69 67 66 65
 78 76 75 73 72 70 67 65
 2 5 8 9 11
 8 11 14 17 19 22 25
 39 42 44 46 48 51
 36 35 34 31 30 27 25
 38 40 43 46 48 49 50
 64 66 68 71 73 76 78
 66 69 70 72 73
 64 61 60 58 55
 84 81 79 76 74
 14 17 20 21 23 25 27
 77 80 81 84 87 88 91 93
 20 17 14 12 9 6 3
 81 84 87 89 92 95
 73 72 71 70 67 64
 50 48 47 44 43 41 38
 62 64 66 69 72 74
 35 34 32 31 28
 79 78 76 74 73 72 71 70
 35 32 29 28 27 26
 63 62 60 58 56 54
 19 16 13 10 9
 80 78 75 73 71
 68 65 62 60 58 57 56
 36 39 40 43 44
 46 44 42 39 36 35 34 32
 29 31 34 37 40 42 43
 57 55 53 52 49 46
 87 84 83 82 80
 13 10 8 6 3
 92 91 90 88 85 84 83 82
 36 33 30 29 27 25 23 21
 39 38 36 34 32 30
 77 80 81 83 85 86
 79 81 82 83 85 88 90
 24 25 28 29 31 33 36 38
 87 85 83 82 80 79
 88 90 92 93 94
 17 19 20 21 22 25 26 29
 37 34 31 30 27
 23 21 19 17 16
 27 25 24 23 22 19 18 17
 13 12 9 6 4 1
 81 83 85 88 91 93
 15 14 12 10 9 7 6
 44 46 48 51 54 55
 27 25 23 22 20 18 17 16
 45 48 49 51 52 53
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 60 59 56 54 53
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 32 29 27 26 23
 7 8 9 11 14
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 20 18 16 14 13 10 9
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 58 59 62 65 68 69
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 71 70 68 67 64 62
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 5 8 10 11 12 14 15
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 52 53 56 57 59
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 49 51 53 55 56
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 67 66 63 62 61
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 29 28 26 23 21
 73 75 76 79 82 83 85 87
 52 54 56 58 61
 83 81 80 77 74 73
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 80 79 78 76 75 73 72 70
 59 62 65 68 71 73 75
 27 29 31 34 37 39 41 43
 12 11 8 6 5 3
 49 48 45 43 42 39 36 33
 26 25 22 21 18 17 15 12
 20 18 17 16 13
 56 54 53 50 47
 46 43 41 40 38 36 35 33
 6 7 9 11 14
 45 48 50 52 55 57 58
 35 37 39 42 44 47 50 51
 93 92 89 88 87 84 81 79
 15 17 20 22 25 28
 65 63 60 57 55 53
 84 81 80 77 76
 79 82 85 88 89
 84 85 86 88 91 93 94
 42 45 46 49 52 53 56
 16 17 20 23 24
 59 60 63 65 68 71 72
 48 49 50 51 54 55 57
 52 55 57 60 61
 42 45 48 49 52 55 57
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 20 23 26 28 29 32
 22 19 17 15 14 12 11
 72 74 76 78 79 80
 11 12 13 16 19
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 68 70 71 74 76
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 29 30 33 34 36 37 39
 80 81 84 87 89
 52 55 57 59 62
 58 56 54 53 50
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 21 18 15 13 10 7 6 4
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 46 48 50 52 55 56 59
 41 43 44 45 47 49 50 53
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 22 24 26 27 30
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 51 49 46 45 42 41
 85 88 89 90 93 94 95 98
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 56 53 51 49 48 45
 78 81 84 87 90
 3 4 6 7 8 10
 25 28 31 33 36 39 40 42
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 35 33 32 30 29 28 26 25
 28 30 33 36 39 41 42
 88 85 84 82 81 80 78 75
 26 25 24 23 20 19
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 31 28 27 24 23 22 20 19
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 69 72 74 77 80
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 86 85 84 82 80 79 77
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 86 84 81 79 76 75 73 71
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 78 79 81 82 85 88
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 12 9 7 4 1
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 51 53 55 58 59 60
 53 52 49 47 46 43
 44 43 42 39 38
 67 70 73 75 78 80 83 84
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 70 68 67 66 65 63 61
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 70 67 64 62 59 57 55
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 61 63 65 67 68 70 72
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 61 58 56 55 54
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 35 33 31 29 28 27
 42 41 40 37 35
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 22 25 26 28 31 34
 77 74 71 69 68 67
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 38 41 43 44 45 47
@@ -0,0 +1,45 @@
 --- Day 3: Mull It Over ---
 "Our computers are having issues, so I have no idea if we have any Chief Historians in stock! You're welcome to check the warehouse, though," says the mildly flustered shopkeeper at the North Pole Toboggan Rental Shop. The Historians head out to take a look.
 The shopkeeper turns to you. "Any chance you can see why our computers are having issues again?"
 The computer appears to be trying to run a program, but its memory (your puzzle input) is corrupted. All of the instructions have been jumbled up!
 It seems like the goal of the program is just to multiply some numbers. It does that with instructions like mul(X,Y), where X and Y are each 1-3 digit numbers. For instance, mul(44,46) multiplies 44 by 46 to get a result of 2024. Similarly, mul(123,4) would multiply 123 by 4.
 However, because the program's memory has been corrupted, there are also many invalid characters that should be ignored, even if they look like part of a mul instruction. Sequences like mul(4*, mul(6,9!, ?(12,34), or mul ( 2 , 4 ) do nothing.
 For example, consider the following section of corrupted memory:
 xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))
 Only the four highlighted sections are real mul instructions. Adding up the result of each instruction produces 161 (2*4 + 5*5 + 11*8 + 8*5).
 Scan the corrupted memory for uncorrupted mul instructions. What do you get if you add up all of the results of the multiplications?
 Your puzzle answer was 166630675.
 --- Part Two ---
 As you scan through the corrupted memory, you notice that some of the conditional statements are also still intact. If you handle some of the uncorrupted conditional statements in the program, you might be able to get an even more accurate result.
 There are two new instructions you'll need to handle:
    The do() instruction enables future mul instructions.
    The don't() instruction disables future mul instructions.
 Only the most recent do() or don't() instruction applies. At the beginning of the program, mul instructions are enabled.
 For example:
 xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))
 This corrupted memory is similar to the example from before, but this time the mul(5,5) and mul(11,8) instructions are disabled because there is a don't() instruction before them. The other mul instructions function normally, including the one at the end that gets re-enabled by a do() instruction.
 This time, the sum of the results is 48 (2*4 + 8*5).
 Handle the new instructions; what do you get if you add up all of the results of just the enabled multiplications?
 Your puzzle answer was 93465710.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,32 @@
 #!/usr/bin/env python3
 import sys, re
 if __name__ == '__main__':
    instr = '\n'.join([line.strip('\n') for line in open(sys.argv[1])])
    res1, res2 = 0, 0
    do = True
    dos = []
    prev = 0
    do = re.compile(r'(don\'t|do)\(\)')
    for d in do.finditer(instr):
        if d.group() == 'don\'t()' and do: 
            do = False 
            dos.append((prev, d.start()))
        elif d.group() == 'do()' and not do:
            do = True
            prev = d.start()
    if do: dos.append((prev, len(instr)))
    mul = re.compile(r'mul\((?P<d1>\d{1,3}),(?P<d2>\d{1,3})\)', re.DOTALL)
    for m in mul.finditer(instr):
        res1 += int(m['d1']) * int(m['d2'])
        if sum([m.start() in range(*r) for r in dos]): res2 += int(m['d1']) * int(m['d2'])
    # challenge 1
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1 @@
 xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))
@@ -0,0 +1 @@
 xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))
@@ -0,0 +1,6 @@
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@@ -0,0 +1,75 @@
 --- Day 4: Ceres Search ---
 "Looks like the Chief's not here. Next!" One of The Historians pulls out a device and pushes the only button on it. After a brief flash, you recognize the interior of the Ceres monitoring station!
 As the search for the Chief continues, a small Elf who lives on the station tugs on your shirt; she'd like to know if you could help her with her word search (your puzzle input). She only has to find one word: XMAS.
 This word search allows words to be horizontal, vertical, diagonal, written backwards, or even overlapping other words. It's a little unusual, though, as you don't merely need to find one instance of XMAS - you need to find all of them. Here are a few ways XMAS might appear, where irrelevant characters have been replaced with .:
 ..X...
 .SAMX.
 .A..A.
 XMAS.S
 .X....
 The actual word search will be full of letters instead. For example:
 MMMSXXMASM
 MSAMXMSMSA
 AMXSXMAAMM
 MSAMASMSMX
 XMASAMXAMM
 XXAMMXXAMA
 SMSMSASXSS
 SAXAMASAAA
 MAMMMXMMMM
 MXMXAXMASX
 In this word search, XMAS occurs a total of 18 times; here's the same word search again, but where letters not involved in any XMAS have been replaced with .:
 ....XXMAS.
 .SAMXMS...
 ...S..A...
 ..A.A.MS.X
 XMASAMX.MM
 X.....XA.A
 S.S.S.S.SS
 .A.A.A.A.A
 ..M.M.M.MM
 .X.X.XMASX
 Take a look at the little Elf's word search. How many times does XMAS appear?
 Your puzzle answer was 2493.
 --- Part Two ---
 The Elf looks quizzically at you. Did you misunderstand the assignment?
 Looking for the instructions, you flip over the word search to find that this isn't actually an XMAS puzzle; it's an X-MAS puzzle in which you're supposed to find two MAS in the shape of an X. One way to achieve that is like this:
 M.S
 .A.
 M.S
 Irrelevant characters have again been replaced with . in the above diagram. Within the X, each MAS can be written forwards or backwards.
 Here's the same example from before, but this time all of the X-MASes have been kept instead:
 .M.S......
 ..A..MSMS.
 .M.S.MAA..
 ..A.ASMSM.
 .M.S.M....
 ..........
 S.S.S.S.S.
 .A.A.A.A..
 M.M.M.M.M.
 ..........
 In this example, an X-MAS appears 9 times.
 Flip the word search from the instructions back over to the word search side and try again. How many times does an X-MAS appear?
 Your puzzle answer was 1890.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,50 @@
 #!/usr/bin/env python3
 import sys, re
 import numpy as np
 from scipy.ndimage import rotate
 from collections import defaultdict
 # copied from stackoverflow
 def groups(data, func):
    grouping = defaultdict(list)
    for y in range(len(data)):
        for x in range(len(data[y])):
            grouping[func(x, y)].append(data[y][x])
    return list(map(grouping.get, sorted(grouping)))
 def a_cross(puzzle, x, y):
    if puzzle[y][x] != 'A': return False
    elif x == 0 or y == 0 or x == len(puzzle[y])-1 or y == len(puzzle)-1: return False
    elif ((puzzle[y-1][x-1] == 'M' and puzzle[y+1][x+1] == 'S') or (puzzle[y-1][x-1] == 'S' and puzzle[y+1][x+1] == 'M')) and ((puzzle[y+1][x-1] == 'M' and puzzle[y-1][x+1] == 'S') or (puzzle[y+1][x-1] == 'S' and puzzle[y-1][x+1] == 'M')): 
        return True
    else: return False
 if __name__ == '__main__':
    puzzle = [line.strip('\n') for line in open(sys.argv[1])]
    words = re.compile(r'(?=XMAS|SAMX)')
    res1 = len(words.findall('D'.join(puzzle)))
    npuzzle = np.array([list(p) for p in puzzle])
    # rows = groups(puzzle, lambda x, y: y)
    #cols 
    res1 += len(words.findall('.'.join(['.'.join([''.join(l) for l in groups(npuzzle, lambda x, y: x)])])))
    #fdiag
    res1 += len(words.findall('.'.join(['.'.join([''.join(l) for l in groups(npuzzle, lambda x, y: x + y)])])))
    #bdiag
    res1 += len(words.findall('.'.join(['.'.join([''.join(l) for l in groups(npuzzle, lambda x, y: x - y)])])))
    res2 = 0
    npuzzle = np.array([list(p) for p in puzzle])
    for y in range(len(npuzzle)):
        for x in range(len(npuzzle[y])):
            res2 += int(a_cross(npuzzle, x, y))
    # challenge 1
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,10 @@
 MMMSXXMASM
 MSAMXMSMSA
 AMXSXMAAMM
 MSAMASMSMX
 XMASAMXAMM
 XXAMMXXAMA
 SMSMSASXSS
 SAXAMASAAA
 MAMMMXMMMM
 MXMXAXMASX
@@ -0,0 +1,140 @@
 SXMSMMXMASMSSSSXAMXMXAMXXAAXMAMSAMMXMAMXSAMXMXMMMMSMMXMXMASMMSMMSSSMAXXMSMSSXMASMXSSSXSMMSSSSSXMASXSAMXSMMSSMXXXXXMASXMXMSSSMMSSMSSSMMMMSSXM
 SAMAMSMSMSXAAMAAXMSXMSSSXSXMSMMSASASXSMSMSSMSSMXAAMXMASXSAAMAXASAXMASXSASMASMMSMMAMXSAAXAAXAAAASAMAXAXASAAAAMMSMMSMMMASASAMXSAAAAMASMAASMMAS
 SAMXSAAXAMMMMMMXAXSAMMAMAMXMAAXSXMASAAMSXAXAAAXSMSSSSXSAMXMMASMMMSXAMSAAXMAMMMAAMASAMXMMMSSMMMMMASMXMMXSMMSXMAAAAAAAXMASMASAMMSMMMAMMMXMAMAM
 SAMXSMSMAMAAXSXSSXSAMMAMAMASXSMSXXXMMMMSMMSMMXMSAAAMXXMXMXXMXXXASAMXMSMSMMXXAXXXMAXAMSXXAAMXSAASMMMSXAAXMAXMSMSMMSXMXMMMSXMXSXMMMMXSXSMSSMMS
 MSSXMAXMASMSSMAXMAMXMMASAXMXAMAMXMMMXMXMAMXXAXSMMMSMXMMAMMXMAMSMMMSSXSAXMSASXXSXMSSMMSAMMMSAMMMMAAAAMMMSSXMAMAAAAMMSXXAAXXSASAAAXMASAAAAMAXA
 XAXASMXSAMAMAMMMMAMASMMMMSXMSMSMSAASXSXSAMAMSMSAXSAMXAAAXMAMAMAAMAAMAMAMAMASAASAMAAXAXAMASMMSSSSSMMSAMAAMAMAMSSMMSAMMSMXXMMASMSMMSAMXMMMSMMM
 MMSMMMAMMSXSAMAASAMXMAAAXMAXMAXAMSMSAMASXSXAMASMMXAAXXXMXMMMASMSMMSSSMSMSMAMMMMAAXXMXMMMXMAAAAXAAMAMMMMASMMXXAAAAMAMMAMXMXAAMXMAAMXSASXMAXAX
 XAAAAMMSAAASXMSASASXSSMMSMMMSAMSAMXMAMAMMAMSMAMMXSXMSMSASXMSXSAMXMAXMAXXXAXXXASXMASMXSAMSSMMSXMXMMAXXASAMAASMSSMMSSMMASAASMXSAMMMSMSXSASASXS
 MSSMMSMMMMMMMMMAXAMAAXMASASASXMXMAMSAMXXSAMXMAMMXSMAAAMSMAASAMXMSXMXMAMSSMMMSASMMXXAASXMAAAMAAMSXSSSMMMSMMMSXAXXXAAXSAXAXMAASXSAMXAXXSAMXSAS
 XAAASXXAAMAAXAMSMMMXMMMMXAMAXAMXAMMSXSXMXSSXSAXXASMMMSMAMMMMAMMAMXXXMASXMAAXMAXASMMMMSAMSSMMMXMAAAMAAMAMMMSMMMSMMMSAMAXSAMXMSAXXSMMMAXAMAMMM
 MMSMSAXSSSMMMMAXAXMASAXSMSMXSAMXXXAMMMMMAMMMSMSMASXMXMMMMAXSMMSASMSSSXMASXMXMMMAXMAMSSMMMAMXXSSSSMSSMMASAMAAAAAAAAMMMXMAASAXMXXMXMASMMSMMSAS
 AXAXMAMMAXAXAMSMSMMAXMXSAXAMSAMXMMMSAAAMAMSAMXAMAXASXMASMMMMMASAMAXAAXSMMMXAAXMXMMMSAMASXAAAAAAAXAXXASASMSSSMSSXMXSXXXMXAMXXSSMMAMMAXSMAXXMA
 XSASMMMMAMMSXSAAMAASXSASXMAMMSMASAMXMXXXAXMASXXSSSMMXMASAAXAMMXXMSMMMMMAAAXSXXMSASXMASXMSAMMMMMMMMMSMMXSXXXMAXMMSMSMSMSAMASXSAAAASMMMAMMMSXM
 XSAMMAXMMMMSMSMSMSMMAMASASXMAAXXMASAXXSMSSSMMAXAAMAAXXASMMSSSSMSAMASAAXMMMMMAAAAMMASXMXMAXXXAAAMXSASAXMMMSSMXMAXSASAAAXXSAMXMSMMXMAASAMSASAX
 AMAMSXSXMASMAMAMMMAMMMXMXAMMXSSMXXMAMSAMXAAMASMMSMSASMXXAASXAAASASAMSSSSSXASMMXMASAMASMMMAMXSSXSAMXSAMSAMXAMASMMMAMSXSXXMAXAXMMSMXSMMMMASXSM
 AMMMXAMASMMMAMAMSSMMXSASXMMSAMAMAMMMMXAMMXMAAXMXXAMXXAXXMMSMSMMSAMAXXXAAAMXAXMXMAMASAAAAAAMXMMXMMMXMMMSASXMMXAAAMXMXXMMMSSMMASAAMMMMASMMMMMM
 MSSMSAAAXAASMSMSXAXMMSASAAAMASMMASAMMSMMMXXMSSSMMAMXMSMXSAMMASMMMMSSMMMMMXXSXXAMAXAMXSSMSMSAAAXMAMXAMXXMAAXAMSMSXMXMSMAMAMAMAMMMXAASAXMXXAAM
 MAAXSAMXMSMSAMXSMXMXAMAMMMXMMMXSMSASAAMAMAXXAAAMSAMAMAAMMAMSAMMAAAXAAAXAXMMMMMMMSXMMAAAAAASMSMSMAMSAMXMXSSMXAMAMMMAXAXAXXXAMASXXSSMMMSSMSSMS
 MMSMSXMAMXMMXMAMMSMMXXAMXXSSXSASASAMMXSAMSSMMSMMSMSMSASXXAMMMMSXMXSSSMSMSMAAAASMMASMMSAMMMMAMAMXXXASMMSAAAASMMAMAXSSSXSSMMASASMXAXAAAAAAAAAS
 MMAAXAMXXSAMXSSMASMAMXSXSSMASXAMMMMMXMXAMAAXXAXXSXSASAMMMSSMMASMMMXAXXAAAMMMSASAXXMAAAAXMXMAMAMMMSMMXAMMSMMAAMMXSMMAXAMAMSAMAXAMMXSMMXSSMMMS
 MSMSMMSAMXAMAMAMAXMASMMAMXMXMMSMSAMSXMSSMSSMMSXXMAMAMAMSAAAXMASASMMAMSMSMSMAMXSAMSMSMSSMSASASASAAXXXMMMMAAMSMMSAMASAMXMAMXMMXMSXSAXMAXMAMMAX
 AAXXAAXAXMAMXXAMXXMASAMSMMMSMAXMMAMMAMAMMXAMAXSMMSMSMXMMMSSMXXSAMXMAMXAAAAAMXAMMMAAXAAXASXSAXXSMSMMXMXSSMSXAAAMASMMMSXMAMAXMXXXAAXSXMASAAMAM
 SXXMMMSXMMSXMSSSMMMASXXAAAAAMAMMMSMXAMASMXAMXMASAAXMSMXMAXAAXMMMMASAMMSMSMSSMAXMXMXMMMMAMMMMMMXMXASAMAMAAXMMMMSAMMASAASASXSXSAMMMSMMXXMAMMAS
 AMSXSAMXSAMXAAAMAMSXMASXXMMSXSAAAXASMSXAMMXXAAXMXSMMAXMXMSMSMXAXSXSASAAAAXAXMAMSMSMXMMXXXAAAXXAMXSMXSASMMMXXAXSXAMMXMAMXAAAAXAAXXXMASMXSAMAM
 XMAXMASAMASXMMSMSMSASXXMASXMAMMMMSASAAAMXASXMSMSMMASMMMAMMAMASAMMASAMXSSMMMSMSXSAAAASAMXSMSSMSASMAAASXSAMAMSMMMXSSSSXSMSMMMMMXSMXMMASAAAAMXS
 SAMXSAMXSMMXMAXXXASXMXAMXSAMAMXXXMXMXMMXMMAAAAAAASAMXMSASMAMXXXAMMSMMAMAMXXAMMAMSMMMSAAMMMMAMSAAXMMMSASXMAMAAAXAXAAMAAXAXMAXSXMMSAMXMMMMXMXM
 MAXAMASXSAMXSASXMAMXSXMAMMAMMMXMMXXXSMSXSMSMMMSMMXXSAMSASXMXAMXMSAMXMXSAMSSMMMAMXSXMXMXSAMSAMXMAXMAXMMMMSSSSSMSXMMMMSXSSSSSSMXAAMXMXSASMMMMS
 SXMASMMMSAXXMASAMXXAXASMXXMMXXMSAAMMMMAMSAXAAXXXXSMMAMMAMMSMSSXAMXMXXAXAMMAMXSAMMAMSAMASAMXASMMSMSMSSXAASAAXXAAMMXMAXMAMAMXAMSSMSAAAMAAMAAAX
 MAMAMASASAMXMAMXMMMMSAMXXSSSSXAMXMMAAAASMAMSMSMSMMXXXMMMMASAAAMMMSSSMSMSMSMMMMASXAMMMMASAMSSMXAXXXMXMSMSMMMMSSMAAXMXXAXMXMSAXAAASMXXMMMSSMSS
 MMMASMMAXXAMMMSMMMAASXMMMAAAMMAMXMMMMSMSMSMXXMASAAASMMXSMASMMXAAAAAXAMAMMMAAMMMMMXSXXMASAMMXAMXMMMMAMSXAAXMAXAXSSXSMXSXSMASXMMSMSASMXSMAXXAX
 SASXSXMMMSXXMAAAASMMSASAAMMMMASMSSMSAXAXAAMMSSSMMMXSAMMMMXXAXXSSMXSMSMAXAMSMSASASAAXMAXSAMXMMMAAAAXAXXAXXMMXSAMXAASAMAAAMAMAMAMXMAMXAAMASXMM
 AMSAMXMMASAMXSSSMSMXSAMXSXXMXSAAAAAAAMAMMMSAMXAMXMXSXMAMXASXMXMAAXMXMMXSMMMXSASASMAMSXAMAMMAMSSXSSSSSMMSAAAXAMXMMMMSAMXXMASXMASAMSMMAMMXXAAA
 SXXAMXMMAXAAMAMAMXAAMAMXXMAMXXMMMMMMMMXMSAMASXMMAXMSASXXMAASMSXMSMXAXSASXSAAMXMXMASMXXXXAMAMXAXMXAXAAMAAXMMSAMMXSXXAXXMXXAXAMXSAMAAMMXMAXSMM
 ASXSMXMMSSMXMAMAMMMASAMXMSMXXSXMAXAXMXAAAASAMAASASASXMAASXMXXAAXAXSMMMXMASMXXAMXSAXXSMMSMSSXMASMMSMXMMMXXMXMAXSAMXMMMAMXSSMSMMMMSSMMMAMSMXAA
 MAMAAXXAMAMASMSSMMXMMASXMAMXMASASXSSMMSMSAMXSSMMMMAMMMMMMAASMSSMMXXXASAMXMMMSSSMMASAMAXMXAMXMSAMXMASMSSMSSSSMMMASMAAMAXAAAAXMAAAMMSXSAAAASXM
 XXMAMMMXXAMAAAAAASXMMMMMSASXMASMMXXAXXXAMXMAMMMXXMXMAMXMSMMMAAAAXSASAXXMMAXXAAAAMAMXMSMSASMMXMAMXMAMAAAAMXAAAXSMSMMSMSSSMMMMSSSMSAAMSMSMXMAA
 XXASASXASXMSSMMSMMAMASXXSAXXSAMASXSSMMMMMAMXMAMXMMAMXMAAXXXXMMXMMXAMMSSMSAMMMSMMMASAXMAMMXAXAMAMSMMXMXMMMMSMMXMAMMSMAMAXAMXMMMXAMMMXXAXMASXM
 XMAXAAXMASAAXMAXAXXMAMAAMAMXMXMAMAAAMAAMSXSSSSMASAMMSAMXMASMXSXMXMXMMAXAAAMXAXAAMXSAMMSMXSAMASAMAAAMSASASAAAXMMAMSASMMAMMMAMAXMXMSMSMSMMMXAA
 SXAXXMMXAMMSMMMMAXSMSXSAMAMXAAMSMMMMMSXMXMAXAAMASAAASASAMMMMAXMAMSAMXMMXMMMMXSSMMMSAMAMXAXAMXSXMSSMXSASAMSSSMMSMSMAMXMXMMSMSMSAMXAAXAAAMSSMM
 AMXSSMXMXMSAMASMXMMAXAMXSXSMMMXMAMMXXXSSMSMMSMMMXXMASMSASXAMXSMMMMSAAXMMMAXMAXASAASXMXXMSSMMXSAXMAMXMMMAMAMAMAAMXMAMXMSSMSAXMAMXSMSMMMMMAASX
 MAXAMXAMMMMASAXAMXMAMAMAAAMXSAMSSMAAXMASAAMMMMSSMXMAMMSAMMSSMMMSAAXXXXMASMSXMMAMMMMASMSMMAMXAXMMSAMXMXSAMXSAMSMMASASAMAAAMXMMSMMXAAXXAAMSXMM
 XSMXXSXSAXSAMXSSXMASXXMXSXXAMAXAMXXMMMMMMMSAASAXAXMXSAMAMAXXMSASMSMASMMMXAAXXMAMSASXMAAMMAMMMSXXMAMSAMXMMXMXMMXSAXXMMSSMMMMSAAASMSMSSSSMMASA
 SXSAAMMSAMMXMAMXASAMXSMMMAMSSMMSSMSMSAAMMXSMSMMXSAMAMXSAMXSMXMASAMXMMAMAMXMMXMSXSASMASMSSXMAAMXMSXMAMMAXMAMMMMXMMSMSAMXMAASMMSSMAAXXXAMAMAAS
 SASMXMAMXMAXMAXMAMXSAMXAMAMAAMAMAXAAXSMSAASXXMXAXAMAXMMAXMAXAMAXMASXSSMAXSAMXAMXMMMXMAXAASMMSSSXSAMSMSSSSSXMAMXAAAXAMASXMXSAMXMASASMMXMAMMMA
 MAMXMSSSSSSSSSSMSMMMXSAMXAMXMMASMMMSMXMXMASAMXMXSASXSMSAMSMXXXMXXASXMASAMSAMXSSSXAAXSMMMSMMAXAMASAMMAXAAXAASASXMMMSAMXSAXASMMAXMASXAXMSXSSSM
 MAMAAXAAAAXAAAMAAAAAMMASMXMASMXSMMMAAXAMXAXAMAAXSAMXAASXMAMMSAMSMXSASXXXMMAXAXAMMMSXMXMSMMMSMAMAMAMMAMMMMSMMASXASAMXXXSAMXSASMSXXMMMMMMXMAAX
 MAXXMMMMMMMMMMMSSSMSSXAAMXXMXMAMAAMMXXSSMMSAMXSAMXMMMMMXSXXASAMXMMSAMMMMSSSMXMMMASMMXAXMAXAMXXMXSAMXXAMAMXAMAMMMMMSMAMMASXSAMXMXAMAMXXXAMSMM
 SSSMMAXAXXXSMSXMAAAAMMMMXASXMSSSMMSMSMMAAASXMXMXMAXAXSSMMSMASXMAMAMSMAAAXAXAAMASMSAXXMSSMMSMMMMXAASMSSMAMSAMMSMSAMAAXXMAMMSASAMMSSSSSSSMMAMX
 XAAASXMMMAAMMSAMXMAMXMASMMSAAAAMMSAMAASMMMMMMASMSMSSXMAAAXMMMMSASASMSXSXMXMSASASXSXMSMAAAAMAAAMAMMMAAAXAMAMXAAMMASMSMXMAMAMMXAXAAAAAAAMSAAMX
 MMMMMMASMSMXAMXMAMXXMSAXAASMMMMMMSASXXMAXXASMXMAMXAMASXMMSMAMASMSXSAMXXXMMXAXMAXAMMAAMSSMMSSMMMMSMXXMSMXMXSMMSMSAMXMASMMMSSSSSMMSSMMMMMAMSMM
 ASXSMSASAAAMSSMXXSAAXMSMMMSXMXMAXSAMXMMSMSXSAXMMMMASXMASXXXAMASASMMXMAMAMSXMAXSMASASMXMAXMMMMSMSAMXSAAAASASAXAAMASXMMMAMXMAMAMMMAMMXXXXMAXXA
 SXAAXMASMMMMMAXMASMSMAMXMASASXSMMMSMMSMMASASAMSMSAAXMMXSXASMSASMMMSMMASAMAMXMAMXXMAMXSXAMMAAAAMXAMAAMMSMMASMMMSMSXMAXSAMAMAMAMASAMMAMXSMXMAX
 MMMMMMAMXXXASAMMAMAXMAMAMAXAMAXSXAXMAAAMSMXMAMAAAMMMSMAMMXMMMMSASAAMSASXSAMAMMSASMAMAMMMSSSMSSSSSMSMXMAAMXMAAXAXMASMMAMSXSXSXSMSASXXXASMSSSM
 SAXMASMMXASXMAXMSSSXMSSSMSMSMMMMMMMSSSSMMMAXAMMSMXSAAMSSSSSMSSSXMMXXMASASXSXSAAAMMMMMSMXAAAAXXMAXAMASXSSMMMSMSMSMXMMAMXMASMMXSXMXMASMMMAAAAS
 SMMMXMAASMMMXSMAXAMASAAAAXAMXSAXSAAMMAAMXXSSSSMXXAMMASXAAAAAXASAXMXMMMMMMMMXMXMSMXSAMAAMXSMMMSMAMXMASAMAXAXAAAAAAAXMAXXMAMASAMMXSAAXAAMMMXMM
 MAAXAXMMSAAMAXMMMAMXMMXMMMASXXASMMXMMMMSXXMAXMXSMASMMSMMMSMMMSMMMMMMAAAAAAXAMXXAAASASMSMMMASAMMXSMSAMAMMMMSMSMSMSMSSXSXMASAMAMAXAMXMSMXSSMAX
 XSXSSSMASXMMMMASMMXMAXXXXMSMASXMXMMSSMASMMMAMMASMAAAAXXXAXXXSXSXAAASXSSSSSMMSAMXMMSAMMAMXSAMAXXAXAXXMAMXAXAXAMXAAXXMMMAMAMXSMMSMMSMXMMSAXSXM
 MMXAAMAMXXXMXMAMMXAAASMMAXXMAMMAXXAAAMXMAMXMMMAXMSSMMSXMMMMXMASXXXMMXAMMAMXSAMSAXXXMXSAMMMAMXASMMMMMSMMSSSMSAMXXXSAAAMAMASMSXXXAXAXAAXMMMMXM
 XMASMMSAMXMXSMMSMSAXMAAXSSSMSSSMMMMSSMSSSMMSXMMSAAAAAXMAMASAMXMASMSSMSMMAMSXAMSMSMAMXMAXMMAMXMAXAMAMASAAAAMAMASAAXMAMSASMMMXMMSMMMSMSMMXMMAA
 ASAXXAMAMASAMXMAMMMMMSAMXAAAAMAAXXAMAMAAXMAMAMSSMSSMMSAXSASASAMAMAAXAAXSXSSMMMXMAMAMMSMMSSMSMXMXXXASMSMMXSMMSAMMAMAXMSAMAXMMSAAAMXXAXAXAAXAS
 MMAXMXXAXSMMXXSASXSAAXMMMMMMMSSMMMAMAMMXMMSSSMXSAAMAMXXXMXXMMMMSMMMMSSMMXXXAAAASASXMXAAAMAAAXAXXMSASXSASAAXAMXSXMMMMAMMSMMXAMXMMMMMMMSSSSSMM
 MMSMMSMXMMASAASMSAMXSXMXASXSAXXAXMASMSXAMMAAXSSMMMSMXMASMSSSSXAAAAXMAMMSSSSSMSMSXSAMSSMMSMMMSASAAMAMASAMSSMXSMSMSAASXMAAXAMSSSSSSXSAAXXMAAAX
 XAXAAMMMASAMMMMAMMMMAAMSMSASXMSMMMMAAMXXSSMMMXMAMXMMAXMASAAAXMSSXMSMASXAAMAAAXAMAMAMAAMMAXXXXAXMXMAMAMAMXXXXAAXXMSXMAMSSMMAXXAAAMAXMXXAMSMMM
 MMSMMSXAMMMMXXMMMXMMMSMAAMAMAAAXXMMXAMXXMMAMMMSXMASMSSSXAMMMMMMXAASMASMMSMSMMMASMSSMSXMMAMMMMSMMMSASASMMMAMSMMMSMMMSMMXAMXSXMMMMMMMMAMSAMXAA
 XXAAAXMSXSMSSXSAMXSAAAXXMMAMMSMSASMSAMXAXSAMAAAASMMMXMAMMSXXXSASMMMMAMAXAMXMAMXAXAXAXMMMXMAAAMAAAXASASXAMAMAMAAAAAAAMXMAMAXASASXAASMASAAMSSM
 XSSSXSAXASAAXXMASASMSMSSXSXSXAMAAAASAMSMMSXSMSSMMMSSSSMXAAXMAMMSMAMASXSSXSXSSSMSMMSAMXSAMSSSSSMMSSMMAMMXXAXASMMXSMSMSASAMASMMXSSSXSSXSAMXAMA
 XMAAAXAMMMMXSASAMAXXXMXMAMAMXXSMSXAMAAMAMXMSAMXAXSXAAMXMMSSMAMXXXAXAAAXMASXAAXAAAXMXMAMAMAAAAAMMXXXAAMMMSSSMSXSAAAAMSMSXMAXAMAMMMMMMMMAXMASM
 MMMMMMXMXAXAXAMSSXMSSMAMAMAMMMXMMMXSMMMAMXAMSMMSMAMMMMAASAXXAMXMXSSMMMMMAMMMMMMXSXMAMXMMMSMXMASMMSMXMAXMAMAAXAAMMMMXSAMXMSSMMAMAAXAMXXXMMAMM
 AAXMASAMXXSMXMAMXAMXASMSXSXSXXAAXSMXASXSSSSMAXXMMMASMSASMXXMXSXSAMXMASAXMAMSAAXSMMSASMXXAMXXXXAXAAXMXSMMSSMMMSMSSXXAMAMMMXAXSASXXSAMXXSAMAAX
 SMXXAMASXMXXSXSXSMMSMMMMMMXMAMMSASAMXMAXAAXSSXSMAXAMXMMAMMSSXSAMSSXSASXMAMXXXXXAAXSASAAMSMSMMSMMSMMSAMXAAAASXMAAXAMXXSMMSMMMMASAASMSAMSAMXSM
 XAAMXSMMAXSAMXMASMXXAAAXSSSMXSAMXXMAMMMMMMMAXAXSMMAMAMSASAXMASMSAMXSAMMSMXMXSSSSXMXMMMMMMAMAAAXMMXAMASMMSSMMAMMMSMXMSMAAXAAAMXMMMMXMAMSAMAXM
 AMSSMAMSXMMAAMMAXMXMSSSMAAAAAXXSAMMSXAAAAMSAMSMSXMAXAXSAMASMMMXMAMAMAMMAMMMMAAMXXMXXMMSXMAMSSMSAMXXXAMXMAXASXMAMAMASASMMSSSSSMXXMMMSSMXAMXMX
 SXAAMAMMMXSMMMSAMXSMAAMMMMMMMMMXAMXMSSSSSXMASMAMMMMXMMMXMASASMMMSMXMAMXAMAAMMSMMAMAMMAAAMSMMAAXMMSSMASMMAMMMMXAXASMSASMXAMAMAAMXXMASAMSXXXXX
 MMSSMXSXXAXASASASASMMXMMXSXASASXSMXXAMXAAXSXMMSMSASASXSAMMSMMXMAXASXSSSSSSXSAMASXSASMMXSMAASMMSXAAAMXMASXSAAAXSXMSXSAMXASMAMXSAMXMXSAMAMMMMS
 MAMXMASMMSSMMASMMASXSMSAASMXSXMAAMMMSSMSMMAMXXAXSASASASMSMMXSAMXSAAAAMXMAMAMASAXASAMXMAXMXMMAAXMMSSMXXXAASMMSMMAXXAMXSXMXSMSXMMMMSASAMMAAAAA
 MASAMASXAAAAMAMMMSMAXAMMXMAXXMMSMMAAMXXAXMASXSXMMMMAMAMMAXXXMAMAMXMMMMAMAMMSMMASMMSMAXMMAMSXMMSMMAXAMXMMMMXXMASMMMXMAAAXAXXMMMAXAAAMXMXSSSSM
 SASXMASMSMSMMMSXSAMXMSMSMSXAAMMMXSMMSASMXMAXMAXSAMMSMXMSASMMSSMMSSMMMSXSASXSASAMXAMSXMXMSMSASXAASMMMAAXXXXXXMAMMASAMXMXMMSXMAMSMSMSSMXXMAMAX
 MASAMXSMMXXAMXSMSASAMXAAASMMMMAMMMXSMAMMAMMXSAMXAMAMAMAMAXAAAAMXAXAAMMMXMXXXAMXSASMMSAXXMASAMSSXMAXMSXSXXMASMAMSSSXSSSMAAMXMAXXAXAMAAASXMSSM
 SAMXXMSASASASAMAXSMAMMMMSMAXMSMSAMSAMXMXAMMMMASMSMMSAMMMSSMMSSMMSSSMSXAXSSSMAMAMAMAAXSMXMXMXMXMAMMMXAASMSAMXMAMMAMAXAAXMMMXXMXMAMXMMSMMAXAMX
 MAXMAXSAMASXMAXAXXXAXXAMAMMMMMXSASMMSMSSMXAASAMMMAAXASXAAMMMAAMXAAAAXMMSMAXSAMASASAMMXXMMMSMMAXAMXSMSXSAXXXMXMXMAMXMXMMXASMAMSMMMAXXXXSSMSSS
 SAMASMMXMAMMAMXSSMSMXSASASMSXSAMXMMAMMXAASMXMXSXSMMSMMMMXMAMXAMMMSMMMMMAMMMSXMXMXSASAXMAMAAAMMSSXXMAXAMXMSMSAAMSSMAMMAXSAXSAMXAAMMXMXMXAAAAA
 MASMMAAXMASAMXAMAAAMXXAMASMSAMXXXMMASMSMMMMAAAMMMMMAMXSSXSXSASAMXAAAAASMMXXMASASMSAMXSASMSSSMXAMXSMSMMMSXAAMMMMAAMASMMMAMMSMSMSMSSSXAMSMMMSM
 SAMXSMMXMASASMSSSSSMMMMMXSAMSMMMSSSMMMAAMASMMAXAAASASXAXAAASAMXSSSSMSAMXSXAASAMXAMXMAMXMXXMAMMASASAAAAAXSMSMSAMXSMXMAAXMMXXXSAAAAAMXXXAMXMAX
 MMSASAXXMASAAAAAAAMAAAXMAMXMMSAASASAXXMXSASXXMAMSXSASMSMMMMMAMMMAMXXMMXMAXMXXMXMSMAMMMAMXMMMXSSMAXXAXMSMMXXAMASAAAASXMMXMAMAMSMMMXMASMMSSSMS
 SMXAXMMSMASMMMMSMSSSSSSMASXMAMMXSAMXMMSAMXSMMMSAAXMXMAMSXAXAMXMMMMSXSSMSAMSASXMAXSMSSSMSMSAXASAMXMXSAMXAXAMXSAMMSMXAMXSAMAMXXAXASXMMSAXXAAAA
 MMMSSMAXAMSAXMXXAAAAAAAMASMSMSMAMAMXMAMASMMXSAMMAMXAMSMSSMXXMAXAXXXAAAXMAMMASXMAXAXAXAAAAMASMSXSXMAMMXSXMSSMMXMAXMMXMASAXXSMSXXXSAAXSXMMSMMM
 SXAMAMXMMXMASMMMSMMMSMMMMMAAAAMASAMMXAMSMXAAMAMXAASMSMMMSMASMMSASMMMMMMMAMMXMAMXMMMSSSMSXSAMXMASMMMSMAMMMXAMXAMXSMSXMASMMSMMXSSMSMMMMAAXMXXX
 AMSSMMXMSAMXMAAAAXXAAXXSXMSMSMSASASXMSSXAMMMSAMSMMMMAAAAMXXSAAMAMAAXMXSXXSMMSSMAAXAMXAAAAMXMAMXMAMXAMASASXXMSXSMAXSMMMSAMXAAAXMASAMASXMMMMAM
 MXAMXMAMAASXSSMMSSMSSSMXAXMAMMMAXXMAAMAMXMAXXMMMXAAXSSMSXMAMMMMXMSMMMASXAMXMAAXSMMSSSMMMSMMMXXSSMMSXMASAMXAXAASMSMMAAAMXMSXMASMAMAMMSMMAMAAX
 XMAMAAXXAXAMXAASXMAAMAMXMMXMXSMSMXMMMMASXMASXSAMMSSMXXAAXMAMMMMMMAMXMASMSMAMSSMXAAXXMAXAAXMASMMAXASMMMMXMSMMMSMAXASXMMSAXMAMSAMXSSMAXAXAMSSS
 AXSSSSMMMMMXSXMMMMMMMAMMXSXMMXAMMSSMMSAMXMASMMAXXAMXMMSMXSAXAAAAMASAMMSAAXXMAAXSMMSASAMSSXSASASXMMSAMXASMAMXMAMMMXMAAASAMXSMXXXMAMMSMXXAMAMX
 SXMAAMAASASXSAXSAAAXMMXSAMASAMXMAAAAAMAMXMAMAXAMAMXSAXAAMSAMSSSSSMSASAMMMSMXMAMXAXXAMXMAAAMASXMAAASAMMMMSMSSSMSMSSMMMMMSAMXAMXMMAXAAAMXSMMSS
 AXMSMMMMSASASMMMSASMXSAMASAMMSXMMSSMMSXMXMMSSMMMXSAXSXMSMMXMAAMMAMXMMAMAXAMMSMSAMXMAMXMMSMMAMXSMMMSAMXMAMXAAAAXAAXASAMXAMAMAMSXMMMMSSXAMXXXA
 MXAMASAAMMMMMMXXAMMAAMMMMMXSXMASAAMAMSXSAAAAAAXXAMXSMXXMXMMMMMMSSMSMSMSMSMSAASAXXAAAMAXAMASXSASXMASMMXMSSMMMMMMMMXXXAAMMSSSXMXSAASAAMMMSAMAM
 XMAXAMMXMAAAAXMMMSMMMMAAXMASAAMMMXXSMSASMSMSSMMMSSSXMAMMAMMMSAMMXAXAAAAAMAMMSMMSXSMSSSMMSAMMSASMSAMXXAXMAMASXMSAXXSMSMXXAAXMAAXXAMMMMMXAAMAX
 MSAMSMMSSSSSXSAAASASAXSXSMAXMMMXXXAXAMAMAXXMAAXAAXMASXMSSMSASMSMMMMSMXMSMAXXAAXMXXAAMAAAMMSAMAMXMASXSMMSAMASAASMSMSAAMXMMMMSMSSSSMSAASMSSSXS
 XMAMMAXXMAMAXXMMXSAMAMMASMSSXXMASMAMAMSMMMASMMMMXMSAMXMAXMMASXAMASAMXXSXXMMMXSMMAMMMMSMMSASXMMMMSSMMMMAXXMXSMMMAAAMSMSAMAMAAXXAAMAMSMMAMXMAM
 XXAMSAMMMSMMMMSMMMAMXMMAMAXMASMASMMMMMXAXXMMMMAXMAMASXMSSXMMMMMSAMMMSMSAXSASXXMMAXMAMMXMSAXXSAAMXMSASXSSSSMSAAMXMSMXXSMSAMSASMAMMAMMSMSMSMSM
 SSMMXMAXAMAAASAAAXAMXSMMMXMMASMMMAXMMAXXMMSAMSAXSASAMXAAXXSAMXXMMXAXAAMAMMASAAXSAMSASMMMMSMXSSSSMMXSXAMAAMASMMSSMXASASASXMAXSAMMSAXMAXAAAAAM
 XAMAMMSMSSSMXAXSMSMSXSAXMMMSASAMSAMXMASMAXSAMMAMSAMXSXSMSASASMMASMMSMSMXMMAMMSMMAMMASAAAAMMAMXMXAMMXMMMMMMMSMXMASMXMAMMMSMSXMAMAXXMSMSMSMMMX
 SAMXSMAMXAAXSMMMAAXXASXMAAAMMMAMXMMMMAMMSMMXMXMXMSMMXAAXXMSAMXMAMAASXXMASMXMAAXXSMMSMMSMSMMASXMXAMXMASAXXMAMMXSAMMSMXMXAAXMASMMSSXMAXAAAXMSS
 SAMXMMAXMSMMAXASMMSMXMMSSMSSXSSMMSAMMASAAXXAMASAAAMMMMMXXXMXXAMASMMMMMMASXSMSMXAMAXAAXXMXXSASAASMMMSAMMSMMMSAAMAMXASASMXSAMMMAAMAMSAMMSMSAAX
 SMXASXSSMXXAXMXXAAXMAMXMAMAMXAXAASASXMSMMASMSASMSMMXSAMXMASMSMSXXMAXMSMASXXXMASMSXMMXMMMMAMAXMMMMAXMAMXAAMXMMXMAMXMSXXAXMXMMSMMMSAMXXXMASMSM
 SMMXSAMXAMXSSMXSMMMSAMMSMMASMMMMMSMMXMSASMAAMAMMXAXAMAAMSAMAAAXAMMMMAAMMMMXAMXMXAMXSAXAAAXMASMSMSSMSAMSMSXXXSMSSSSXMMSMMMSMXAMXXMMXSAAMAMXAA
 XXAMMXMMXMAMAXMAXSASXSAMAMSSMAAAASMASMSAMXXMAMMXSMMMSMXXMAXSMSMSMASXSMSAAXMXMAXXXSMSASMMMSAXXAAAMMAMMXAAMMMMMAXAAMXMAAAMAAMXAMXXXXASMSMAAXXS
 AXSXXAXAAMASAMMSXMASXMAMSMAMXSSXXSMASXMXMASXSSMXXAAAAXMXXXMMSMAXMASAAXSMXSASXMXSMMAMAMXAASXMMSMMSMSMMSMXMAXAAXMMMMAMSSSMMSSSSMMMSMMSAMMSSSMM
 SAMXSMSSXSXSXMXAMMAMMMXXXAMXAMAMSMMMSASXMXSAMXMASMMSSSMSAMXMAMSMSXMXMMXXASMXAMMXAMSMAMXMMSAXAAASAAMAMXSAAMSXMSSXAMXMMAAMXAAMMAAXMASMMMAAAAXM
 MAXAAAAXMMMMAXXMSMASMMMAMAXMAMAMAAMXXAMAXXMMMSMAXAAXAAAXMMAMMSXMASAMXAXMASXXSMASXMMMASMMMMMMXXSMMXXAMASXSXXXASAMXMMAMXMXMMSMSSMMSXMAAMMSSMMS
 SSMMMSMSMAAXAMXMAXASAAXXSXMXMSSSSSMMSSMMMMSMSAMMSMAMMMMMXXAMXMXXMASXXXSAMXMSMMMXMAXMAXMASXSAMSAMXSSXMAMSAMXAMMAMAMSXMMSXXXMMXAXASXSXMSAMAAXA
 MXAAAAXSMSSSMSXMAMSSMSAAMMMMXAAAAXAXAMASMXAXSAMXAXXXXASMMMXSAAXMXXMMMMAXXSXAXXMASMMMSSSMSMMAXSAMXXASAMXMMXAMASXMAXASMASXMMMXSMMMSASAXMMSSMSM
 MSXMSMXMXXMAMMASXSXMAMMXMAAASMSMMMSMMSAXASXMXMMSXSMMSMSAXAASMMMMSMMAAXMMMMMMSAMXXMASAAAAXAMXMMAMXSAMXMMAMMSSMXASMSAAMASASMMASAMAMAMMXMAMMAXX
 MAAMAMSMSSSMMSAMMMAMXMXAMSSXSXAAXXXAMMMSXXMASMMSAXXAAXSAMSMXAXSAXASMXSAAXMAXMXSXMASMMSMMMSMMMXMMMXAMXMAAMAAMXMMMMMXMAMSAMAMMSAMMMMAXAMAXMSMM
 MMSMASXAAMAXMMMSASMMXMSXXAXXMXMXMMXMMAAXXAMXMAASASXSXXMAMXASMMMXXXAAXSMMSSMSAMMMMSXSAXMMAXAXXASASMAXSMSSSMMSSSMXAXASXMMAMXSXSAMXMSMSMSAXSAAA
 XAAXXMMMMSSMXAXXMAAASMMSMMSSMSSMASASXMXSXXMXSMMMAMXAMSSMMXMAMAMAMMMXMSAMXAASXSAAMXAMXSAMASAMSMSASXMMXAAMAAXAAAXSXSASXMMAMMAASXMAXAAAXAASXMXS
 MSSSSXMXAAAMSMSMMSMMMAAAXAXAAAXAXSASAMXSXSAMXAXMXMXMMXASXXSMSAMAXXAXSXMSSMMMASXSSMSMMSMAMMXMMAMAMMSMMMMSSMMMMMMXMSAMAMSMSAMXMASMSMSMSMSMXXSM
 AXAAXMASMXAMAAAXMAAXSMMMMASMMMSMAMAMASXMASXXXXXMASXXSSMMMAMAXXXMXMMSXAXMASMMAMMMMAMMMMXMMMMSMAMAMAAMAAMMAMMSAXXAMMAMSMAAMXXAMXMXMAXAMXAAAMAM
 SMMMMAAXMASMMSMSSSSXSMAMMMMAMXMMAMAMMSAMAMMMMSMSMSXMAMAAMAMMMSMXAAMXXAMSMMXMAXAAMAMMAMAAAAMXSMXMMSSSMSMXAMASASXSSSMMASXSSSSSSSMASMMAMSMSMMMS
 XAAXSMMSSXMAAXAAAXMAMMSAAASAMMAXXMASAXXMASAAXXMAAXXSSMSMSMSAXMAMSMSAXMMASMASXSSSSMXSASXSSMSAMXMSXMAXAAXSSMMSAMAMMMSMASXMAAXXAMSASASXMXAXXXXS
 XSXXAMAMXAMMMMSMMMXMAAXMSMSMSMSXSMXMMSXMXSASXMSMSMMMMAAAAAXXSMSMAAMMMXSASMXSMAMAMAXMASXAXAXMMAMAAMAMMMMMMAMSMMAMAAMMAMAMMAMMXMMXSAMXSMMMXSAS
 MXMMMSMMMSMSAMMAXAMXMXSAXXMMAMXASAAAAAAMXSXMAXSXAMSAMSMMMSMMMAMAMXMMAMMAXMXXAAMAMAXMAMMMMSMMSXSMSMAXAXSXSAMXASXSMSSMMSXMXMMMAMMMXMMMSAAAMMAM
 AXAAXAAAAAXSASXSMSAAXMMMMASXXXMAMSSMMXSMAMAMXMSAMXAXMXXMAMXAMMMAXAXMSSSSSMXASXMSMSAMAMAAAAAXXXXAMMSMMMAASMXSAMXXXMXAASAMXMASAMAMMXXXSSMSMMXM
 MMMMMSSMXXXMMMAXAXSMMMAAMAMXMASAMXMASAMMAXSASXSXXAMMMMSAMXSMSASMSSSMAXAAAASXMSXMAMMSASXMSSSMMMMMMAXASAMXMAASXSMMMMMMMXASASASMSMSAMSMXXMAMSAM
 XMXSAXMAMSMSSMMMSMAXASASXMXSAAXAMSAAMAMMAMXAMAMMMSXASAMAMMSAMASXAMAMMSMMMMMAAMMMAMXMMSXAXXXAAAAAMAMAMXSAMXMXAXMAAAMAXMXMAMASAAXXXAMMAMMSXSAS
 XAAAXSAASAAAMASAMXSMXSAXASXMMMMAMAMSSSMMSMMAMXMASAAASXSAMMMSMAMMSSSMAAXAXXSMMMASAMAMXSMMMXSSSSSMSAMAMXSAMMXMAMXMMMSASAAMXMAMMMSMMMASXSAMXSSM
 XMAMMMXMSMMMSAMMSXMSMMMSAMXMAMSAMASXAXMAXAMXMAMMMMMMMASASMAMMXMXAMAMSSSMSMMXXSMSASASAMAMMAMMMAAASMMSSMXXMXAASMMSAMXAMXAMXMAMSASAMXAXXMAXASMS
 SSMMSXMXXXSXMXXMAMMASAAMAMAMAXMAMXSMAMMASXMSSXSASXSXXXMMAMAMSMSMMSMMAAXXAAASMMMSASAMMSAMMASAMMMMMAAMAXSMXXASXAASAMMMMXMXMXSAMASASMAMXMSMMMAM
 MAAASASXMMAAXSMSAMMAXXMMAXXMSXSAMMMMMXMASAXXAASAMAMXMSMXAMAXAAXMXAXMMMMSSSMSAAXMAMXMMSAXSASASXMAMMMSAMXAMSMMMMMSAMAMAMSAMXXMMXMAMMMAAAAAXMAM
 XSMMMXMAAASMMSAMAXMSMSMSMSAXAASASAAAXXMASMSMMMMMMAMASASMSXSAMXMXSSSXSAAAMXMMMMSMAMSMASAMMXSXMASXSAXMXMAXMAAXXSAMXSASAMMASASXSSMMMMXSMSSSXSSS
 MXASXSSSMXAMAMXMAMSMAAAAASMMMXMASMSMSMXXSAMXAXMASXSMSAMXXAMXMASAAAAASMSXMASXMASXAAAMMXMXXAMASAMXSAMSASASXXMMXMASXMMSASXSMASAXSXXAXXXMAMXAXAM
 MSAMAAAAXSMXSXXXXXAAMMMMMMSSMMMXMMMMMMMMMXMSMSSMAMAMMMMAMMMXMAMMXMMMMXMAMAXAMASXSSSSXSXSMXSAMASXMAMMXMASMMSAXSAMMSMSAMXAMMMMMMSSSSMMSMMXSMSA
 MMMMMMMMMASAMXAMXSMSSXXXMMMMAASASAXAAAMAAAXAAMAMMSSMAAMXSASMMSSMXMSXMSSSMSSMMXSMMAAMAAAXXAMAMXMAMMMXSMMMAXSAMSASAAMMAMXMASAXAAAXXAMAAAXMXAXA
 XAXXAXXXXAMMXSMAMXAAAMAMAAAMSMSASMSSSSSMSSSMSMXSAMXSXSAASMSAMAAXXMASMAAAAXAMAASMMMMMMMSMMSMSMSSSMAAMXAAXSMMAMXAMMMMXAMXXASXSMSXSSXMMXMMAXMXX
 SMSMXMMMMMSXMASXAMMMSAXMSSSXMXMAMXMMMMAAAAAAXMXXAMAMMMMXSXSAMSSMXSASMAXMMMAXMMSAMXXAXAAAXAAMAMAASMSSSXMXMAMSMMXMMSSSMSXMASMXMAAMMMSSMMSSMMSM
 AXAXAXAAAMAAAMXSMMSAXXXMAMMMXXMXMAAAAMAMMSMMMMMSMMAMXAXXMAMAMXXAAMASXMSSXSAMMXMMMMXMMSSSMMSMAMXMASAAAXSASMMMAXSAAAAAAMXSAMXMMMMMAAAAAAAAAAAA
 MSMMMSXMXXAXMSAXMASMXSMMASMMXXMAMXXSSSMSXXXXAAAAXSAMSSSMMXMSAMXMMMAMAMAMXSXMMASXMMAMMXMAMXMXXMAXMMMSMMMAXMASAMSAMMSMMMAMASMMMSMSMMXSMMXMMSSS
 MAXAMSMSSXSAAMASMXSAASXSASAAAXSSMSMMAAAXXXXSSMXSMSMMMXAXAMXXASXMAMASAMAXMMAMSMSAMSSSMASAMMMXMXXSAMAAAXXXMMXMXMXAMXAAAMASAAAMXAAXAXXMXSMSMAAX
 SASXAXASAAMXMASMXAMMMSAMXSMMXXAAASMMSMMMMXXMAXAMMXMAXSMMMMMSXMASASMXAMMMAMAMSAMXMAMAXASXSAMXMAXMAMSSSMMXMXXMXMSSMXMMASAXMSXMMMMMSMXXAXAAAMMM
 MASXMMMMMMMAMSMMXXSMAMAMMXMAXMMMMMAMASXAMXSSSMMSASXSXMMXAAXSMSAMXMASXMSASMASMAMAMXSAMXSMXASAMSMSAMAMAASAMSXMAAAXMASMASAXMMMMASAMAASMMMSMSAMS
 MAMMXAXAXXSAMAAAAMXMASAMSAMXSSXAAAMMAMSASAMXAAAAXMAMXAASXSMXAMSSXMASAASAMSXMMAMXSAMXSXSASXMASAASMMAMSAMASAASMSMXSASMAMAMAAMSASASMSXAAAXSXMSX
 MMSASMSMSASXSSSMMAMSXSASMXMXSAMSSSXMXXSXMXSSSMMSSMXMAMASAAMMXMMSXMSSMMMSMXXMAXSAMXXSAMXXSSSSMMXMXSSMXMSMMMXMMAMXMXSMASMSMXMMASMMXMMSMSSMMSSX
@@ -0,0 +1,97 @@
 --- Day 5: Print Queue ---
 Satisfied with their search on Ceres, the squadron of scholars suggests subsequently scanning the stationery stacks of sub-basement 17.
 The North Pole printing department is busier than ever this close to Christmas, and while The Historians continue their search of this historically significant facility, an Elf operating a very familiar printer beckons you over.
 The Elf must recognize you, because they waste no time explaining that the new sleigh launch safety manual updates won't print correctly. Failure to update the safety manuals would be dire indeed, so you offer your services.
 Safety protocols clearly indicate that new pages for the safety manuals must be printed in a very specific order. The notation X|Y means that if both page number X and page number Y are to be produced as part of an update, page number X must be printed at some point before page number Y.
 The Elf has for you both the page ordering rules and the pages to produce in each update (your puzzle input), but can't figure out whether each update has the pages in the right order.
 For example:
 47|53
 97|13
 97|61
 97|47
 75|29
 61|13
 75|53
 29|13
 97|29
 53|29
 61|53
 97|53
 61|29
 47|13
 75|47
 97|75
 47|61
 75|61
 47|29
 75|13
 53|13
 75,47,61,53,29
 97,61,53,29,13
 75,29,13
 75,97,47,61,53
 61,13,29
 97,13,75,29,47
 The first section specifies the page ordering rules, one per line. The first rule, 47|53, means that if an update includes both page number 47 and page number 53, then page number 47 must be printed at some point before page number 53. (47 doesn't necessarily need to be immediately before 53; other pages are allowed to be between them.)
 The second section specifies the page numbers of each update. Because most safety manuals are different, the pages needed in the updates are different too. The first update, 75,47,61,53,29, means that the update consists of page numbers 75, 47, 61, 53, and 29.
 To get the printers going as soon as possible, start by identifying which updates are already in the right order.
 In the above example, the first update (75,47,61,53,29) is in the right order:
    75 is correctly first because there are rules that put each other page after it: 75|47, 75|61, 75|53, and 75|29.
    47 is correctly second because 75 must be before it (75|47) and every other page must be after it according to 47|61, 47|53, and 47|29.
    61 is correctly in the middle because 75 and 47 are before it (75|61 and 47|61) and 53 and 29 are after it (61|53 and 61|29).
    53 is correctly fourth because it is before page number 29 (53|29).
    29 is the only page left and so is correctly last.
 Because the first update does not include some page numbers, the ordering rules involving those missing page numbers are ignored.
 The second and third updates are also in the correct order according to the rules. Like the first update, they also do not include every page number, and so only some of the ordering rules apply - within each update, the ordering rules that involve missing page numbers are not used.
 The fourth update, 75,97,47,61,53, is not in the correct order: it would print 75 before 97, which violates the rule 97|75.
 The fifth update, 61,13,29, is also not in the correct order, since it breaks the rule 29|13.
 The last update, 97,13,75,29,47, is not in the correct order due to breaking several rules.
 For some reason, the Elves also need to know the middle page number of each update being printed. Because you are currently only printing the correctly-ordered updates, you will need to find the middle page number of each correctly-ordered update. In the above example, the correctly-ordered updates are:
 75,47,61,53,29
 97,61,53,29,13
 75,29,13
 These have middle page numbers of 61, 53, and 29 respectively. Adding these page numbers together gives 143.
 Of course, you'll need to be careful: the actual list of page ordering rules is bigger and more complicated than the above example.
 Determine which updates are already in the correct order. What do you get if you add up the middle page number from those correctly-ordered updates?
 Your puzzle answer was 5948.
 --- Part Two ---
 While the Elves get to work printing the correctly-ordered updates, you have a little time to fix the rest of them.
 For each of the incorrectly-ordered updates, use the page ordering rules to put the page numbers in the right order. For the above example, here are the three incorrectly-ordered updates and their correct orderings:
    75,97,47,61,53 becomes 97,75,47,61,53.
    61,13,29 becomes 61,29,13.
    97,13,75,29,47 becomes 97,75,47,29,13.
 After taking only the incorrectly-ordered updates and ordering them correctly, their middle page numbers are 47, 29, and 47. Adding these together produces 123.
 Find the updates which are not in the correct order. What do you get if you add up the middle page numbers after correctly ordering just those updates?
 Your puzzle answer was 3062.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,37 @@
 #!/usr/bin/env python3
 import sys
 from functools import cmp_to_key
 if __name__ == '__main__':
    lines = [line.strip('\n') for line in open(sys.argv[1])]
    rules = [tuple([int(y) for y in x.split('|')]) for x in lines[:lines.index('')]]
    updates = [[int(x) for x in line.split(',')] for line in lines[lines.index('')+1:]]
    def compare(a,b):
        for rule in rules:
            if a in rule and b in rule:
                return -1 if a == rule[0] else 1
        return 0
    res1, res2 = 0, 0
    for update in updates:
        correct = True
        for i, u in enumerate(update):
            for u2 in update[i+1:]:
                if compare(u,u2) == 1:
                    correct = False
                    break
            if not correct:
                update.sort(key=cmp_to_key(compare))
                res2 += update[int(len(update)/2)]
                break
        if correct: res1 += update[int(len(update)/2)]
    # challenge 1
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,28 @@
 47|53
 97|13
 97|61
 97|47
 75|29
 61|13
 75|53
 29|13
 97|29
 53|29
 61|53
 97|53
 61|29
 47|13
 75|47
 97|75
 47|61
 75|61
 47|29
 75|13
 53|13
 75,47,61,53,29
 97,61,53,29,13
 75,29,13
 75,97,47,61,53
 61,13,29
 97,13,75,29,47
@@ -0,0 +1,195 @@
 --- Day 6: Guard Gallivant ---
 The Historians use their fancy device again, this time to whisk you all away to the North Pole prototype suit manufacturing lab... in the year 1518! It turns out that having direct access to history is very convenient for a group of historians.
 You still have to be careful of time paradoxes, and so it will be important to avoid anyone from 1518 while The Historians search for the Chief. Unfortunately, a single guard is patrolling this part of the lab.
 Maybe you can work out where the guard will go ahead of time so that The Historians can search safely?
 You start by making a map (your puzzle input) of the situation. For example:
 ....#.....
 .........#
 ..........
 ..#.......
 .......#..
 ..........
 .#..^.....
 ........#.
 #.........
 ......#...
 The map shows the current position of the guard with ^ (to indicate the guard is currently facing up from the perspective of the map). Any obstructions - crates, desks, alchemical reactors, etc. - are shown as #.
 Lab guards in 1518 follow a very strict patrol protocol which involves repeatedly following these steps:
    If there is something directly in front of you, turn right 90 degrees.
    Otherwise, take a step forward.
 Following the above protocol, the guard moves up several times until she reaches an obstacle (in this case, a pile of failed suit prototypes):
 ....#.....
 ....^....#
 ..........
 ..#.......
 .......#..
 ..........
 .#........
 ........#.
 #.........
 ......#...
 Because there is now an obstacle in front of the guard, she turns right before continuing straight in her new facing direction:
 ....#.....
 ........>#
 ..........
 ..#.......
 .......#..
 ..........
 .#........
 ........#.
 #.........
 ......#...
 Reaching another obstacle (a spool of several very long polymers), she turns right again and continues downward:
 ....#.....
 .........#
 ..........
 ..#.......
 .......#..
 ..........
 .#......v.
 ........#.
 #.........
 ......#...
 This process continues for a while, but the guard eventually leaves the mapped area (after walking past a tank of universal solvent):
 ....#.....
 .........#
 ..........
 ..#.......
 .......#..
 ..........
 .#........
 ........#.
 #.........
 ......#v..
 By predicting the guard's route, you can determine which specific positions in the lab will be in the patrol path. Including the guard's starting position, the positions visited by the guard before leaving the area are marked with an X:
 ....#.....
 ....XXXXX#
 ....X...X.
 ..#.X...X.
 ..XXXXX#X.
 ..X.X.X.X.
 .#XXXXXXX.
 .XXXXXXX#.
 #XXXXXXX..
 ......#X..
 In this example, the guard will visit 41 distinct positions on your map.
 Predict the path of the guard. How many distinct positions will the guard visit before leaving the mapped area?
 Your puzzle answer was 5212.
 --- Part Two ---
 While The Historians begin working around the guard's patrol route, you borrow their fancy device and step outside the lab. From the safety of a supply closet, you time travel through the last few months and record the nightly status of the lab's guard post on the walls of the closet.
 Returning after what seems like only a few seconds to The Historians, they explain that the guard's patrol area is simply too large for them to safely search the lab without getting caught.
 Fortunately, they are pretty sure that adding a single new obstruction won't cause a time paradox. They'd like to place the new obstruction in such a way that the guard will get stuck in a loop, making the rest of the lab safe to search.
 To have the lowest chance of creating a time paradox, The Historians would like to know all of the possible positions for such an obstruction. The new obstruction can't be placed at the guard's starting position - the guard is there right now and would notice.
 In the above example, there are only 6 different positions where a new obstruction would cause the guard to get stuck in a loop. The diagrams of these six situations use O to mark the new obstruction, | to show a position where the guard moves up/down, - to show a position where the guard moves left/right, and + to show a position where the guard moves both up/down and left/right.
 Option one, put a printing press next to the guard's starting position:
 ....#.....
 ....+---+#
 ....|...|.
 ..#.|...|.
 ....|..#|.
 ....|...|.
 .#.O^---+.
 ........#.
 #.........
 ......#...
 Option two, put a stack of failed suit prototypes in the bottom right quadrant of the mapped area:
 ....#.....
 ....+---+#
 ....|...|.
 ..#.|...|.
 ..+-+-+#|.
 ..|.|.|.|.
 .#+-^-+-+.
 ......O.#.
 #.........
 ......#...
 Option three, put a crate of chimney-squeeze prototype fabric next to the standing desk in the bottom right quadrant:
 ....#.....
 ....+---+#
 ....|...|.
 ..#.|...|.
 ..+-+-+#|.
 ..|.|.|.|.
 .#+-^-+-+.
 .+----+O#.
 #+----+...
 ......#...
 Option four, put an alchemical retroencabulator near the bottom left corner:
 ....#.....
 ....+---+#
 ....|...|.
 ..#.|...|.
 ..+-+-+#|.
 ..|.|.|.|.
 .#+-^-+-+.
 ..|...|.#.
 #O+---+...
 ......#...
 Option five, put the alchemical retroencabulator a bit to the right instead:
 ....#.....
 ....+---+#
 ....|...|.
 ..#.|...|.
 ..+-+-+#|.
 ..|.|.|.|.
 .#+-^-+-+.
 ....|.|.#.
 #..O+-+...
 ......#...
 Option six, put a tank of sovereign glue right next to the tank of universal solvent:
 ....#.....
 ....+---+#
 ....|...|.
 ..#.|...|.
 ..+-+-+#|.
 ..|.|.|.|.
 .#+-^-+-+.
 .+----++#.
 #+----++..
 ......#O..
 It doesn't really matter what you choose to use as an obstacle so long as you and The Historians can put it into position without the guard noticing. The important thing is having enough options that you can find one that minimizes time paradoxes, and in this example, there are 6 different positions you could choose.
 You need to get the guard stuck in a loop by adding a single new obstruction. How many different positions could you choose for this obstruction?
 Your puzzle answer was 1767.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,81 @@
 #!/usr/bin/env python3
 import sys
 from copy import deepcopy
 import numpy as np
 def show(maps):
    st = ''
    for line in maps:
        print(''.join(line))
 def find_guard(current):
    move = (0,0)
    for y in range(0, len(current)):
        for x, field in enumerate(current[y]):
            if field == '.' or field == '#' or field == 'X': continue
            elif field == '^': move = np.array((0, -1))
            elif field == '>': move = np.array((1, 0))
            elif field == 'v': move = np.array((0, 1))
            elif field == '<': move = np.array((-1, 0))
            guard = np.array((x, y))
            return(guard, move, field)
 def guard(m, guard, move):
    next = {(0,-1): '>', (1,0): 'v', (0,1): '<', (-1,0): '^'}
    nextm = {(0,-1): (1,0), (1,0): (0,1), (0,1): (-1, 0), (-1,0): (0,-1)}
    current = m
    while (0 <= guard[0] + move[0] < len(m[0]) and 0 <= guard[1] + move[1] < len(m)):
        gx, gy = guard
        guard = guard + move
        x, y = guard
        if m[y][x] == '#':
            current[gy][gx] = next[tuple(move)]
            return current, True, np.array((gx, gy)), np.array(nextm[tuple(move)])
        else:
            current[gy][gx] = 'X'
    current[guard[1]][guard[0]] = 'X'
    return current, False, np.array((guard[0], guard[1])), np.array(nextm[tuple(move)])
 def test_loop(m, x, y, g, move, o):
    current = deepcopy(m)
    current[y][x] = '#'
    positions = set([])
    positions.add((g[0], g[1], o))
    running = True
    while running:
        current, running, g, move = guard(current, g, move)
        o = current[g[1]][g[0]]
        if (g[0], g[1], o) in positions: 
            return True
        positions.add((g[0], g[1], o))
    return False
 if __name__ == '__main__':
    maps = [list(line.strip('\n')) for line in open(sys.argv[1])]
    sguard, smove, start = find_guard(maps)
    # challenge 1
    running = True
    current = deepcopy(maps)
    g, m = sguard, smove
    while running:
        current, running, g, m = guard(current, g, m)
    res1 = sum([m.count('X') for m in current])
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    res2 = 0
    for y in range(0, len(current)):
        for x, field in enumerate(current[y]):
            if field == '#' or field == '.': continue
            res2 += test_loop(maps, x, y, sguard, smove, start)
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,10 @@
 ....#.....
 .........#
 ..........
 ..#.......
 .......#..
 ..........
 .#..^.....
 ........#.
 #.........
 ......#...
@@ -0,0 +1,130 @@
 ................#.................#.#...........................#.#..................#............................................
 ..........#................#...........#...................#.#....................................................................
 ....#......#......#............#.#........#..........#.......#.......#...#........#..........#.........................#..........
 ..................#............#.....##...............#..#.....................#...........#......................................
 #.........#.............................................................#........#............#........#.....#...#...........#....
 .....#...#......#..................................................#........#..................#......#.......................#...
 #.................................................#......................#......#...................................#.............
 ...#.#...#.....................................#.......................#.........#..................................#....#........
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 ........#.#.......#.................##.......................#..........#...........................#...#.........................
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 .#..........#......#...#.......#..........................#....................#.#.............................#..................
 ...............#.....##.......#..#...###......#......................#.................................#.#......#..#..............
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@@ -0,0 +1,54 @@
 --- Day 7: Bridge Repair ---
 The Historians take you to a familiar rope bridge over a river in the middle of a jungle. The Chief isn't on this side of the bridge, though; maybe he's on the other side?
 When you go to cross the bridge, you notice a group of engineers trying to repair it. (Apparently, it breaks pretty frequently.) You won't be able to cross until it's fixed.
 You ask how long it'll take; the engineers tell you that it only needs final calibrations, but some young elephants were playing nearby and stole all the operators from their calibration equations! They could finish the calibrations if only someone could determine which test values could possibly be produced by placing any combination of operators into their calibration equations (your puzzle input).
 For example:
 190: 10 19
 3267: 81 40 27
 83: 17 5
 156: 15 6
 7290: 6 8 6 15
 161011: 16 10 13
 192: 17 8 14
 21037: 9 7 18 13
 292: 11 6 16 20
 Each line represents a single equation. The test value appears before the colon on each line; it is your job to determine whether the remaining numbers can be combined with operators to produce the test value.
 Operators are always evaluated left-to-right, not according to precedence rules. Furthermore, numbers in the equations cannot be rearranged. Glancing into the jungle, you can see elephants holding two different types of operators: add (+) and multiply (*).
 Only three of the above equations can be made true by inserting operators:
    190: 10 19 has only one position that accepts an operator: between 10 and 19. Choosing + would give 29, but choosing * would give the test value (10 * 19 = 190).
    3267: 81 40 27 has two positions for operators. Of the four possible configurations of the operators, two cause the right side to match the test value: 81 + 40 * 27 and 81 * 40 + 27 both equal 3267 (when evaluated left-to-right)!
    292: 11 6 16 20 can be solved in exactly one way: 11 + 6 * 16 + 20.
 The engineers just need the total calibration result, which is the sum of the test values from just the equations that could possibly be true. In the above example, the sum of the test values for the three equations listed above is 3749.
 Determine which equations could possibly be true. What is their total calibration result?
 Your puzzle answer was 4998764814652.
 --- Part Two ---
 The engineers seem concerned; the total calibration result you gave them is nowhere close to being within safety tolerances. Just then, you spot your mistake: some well-hidden elephants are holding a third type of operator.
 The concatenation operator (||) combines the digits from its left and right inputs into a single number. For example, 12 || 345 would become 12345. All operators are still evaluated left-to-right.
 Now, apart from the three equations that could be made true using only addition and multiplication, the above example has three more equations that can be made true by inserting operators:
    156: 15 6 can be made true through a single concatenation: 15 || 6 = 156.
    7290: 6 8 6 15 can be made true using 6 * 8 || 6 * 15.
    192: 17 8 14 can be made true using 17 || 8 + 14.
 Adding up all six test values (the three that could be made before using only + and * plus the new three that can now be made by also using ||) produces the new total calibration result of 11387.
 Using your new knowledge of elephant hiding spots, determine which equations could possibly be true. What is their total calibration result?
 Your puzzle answer was 37598910447546.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,31 @@
 #!/usr/bin/env python3
 import sys
 def maths(nums, sec=False):
    if len(nums) == 2:
        yield nums[0] * nums[1]
        yield nums[0] + nums[1] 
        if sec: yield int(str(nums[0]) + str(nums[1]))
    else:
        yield from maths([nums[0] * nums[1]] + nums[2:], sec)
        yield from maths([nums[0] + nums[1]] + nums[2:], sec)
        if sec: yield from maths([int(str(nums[0]) + str(nums[1]))] + nums[2:], sec)
 if __name__ == '__main__':
    lines = [line.strip('\n') for line in open(sys.argv[1])]
    res1, res2 = 0, 0
    for line in lines:
        test, nums = line.split(': ')
        nums = [int(n) for n in nums.split(' ')]
        if int(test) in maths(nums): res1 += int(test)
        if int(test) in maths(nums, True): res2 += int(test)
    # challenge 1
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,9 @@
 190: 10 19
 3267: 81 40 27
 83: 17 5
 156: 15 6
 7290: 6 8 6 15
 161011: 16 10 13
 192: 17 8 14
 21037: 9 7 18 13
 292: 11 6 16 20
@@ -0,0 +1,850 @@
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@@ -0,0 +1,125 @@
 --- Day 8: Resonant Collinearity ---
 You find yourselves on the roof of a top-secret Easter Bunny installation.
 While The Historians do their thing, you take a look at the familiar huge antenna. Much to your surprise, it seems to have been reconfigured to emit a signal that makes people 0.1% more likely to buy Easter Bunny brand Imitation Mediocre Chocolate as a Christmas gift! Unthinkable!
 Scanning across the city, you find that there are actually many such antennas. Each antenna is tuned to a specific frequency indicated by a single lowercase letter, uppercase letter, or digit. You create a map (your puzzle input) of these antennas. For example:
 ............
 ........0...
 .....0......
 .......0....
 ....0.......
 ......A.....
 ............
 ............
 ........A...
 .........A..
 ............
 ............
 The signal only applies its nefarious effect at specific antinodes based on the resonant frequencies of the antennas. In particular, an antinode occurs at any point that is perfectly in line with two antennas of the same frequency - but only when one of the antennas is twice as far away as the other. This means that for any pair of antennas with the same frequency, there are two antinodes, one on either side of them.
 So, for these two antennas with frequency a, they create the two antinodes marked with #:
 ..........
 ...#......
 ..........
 ....a.....
 ..........
 .....a....
 ..........
 ......#...
 ..........
 ..........
 Adding a third antenna with the same frequency creates several more antinodes. It would ideally add four antinodes, but two are off the right side of the map, so instead it adds only two:
 ..........
 ...#......
 #.........
 ....a.....
 ........a.
 .....a....
 ..#.......
 ......#...
 ..........
 ..........
 Antennas with different frequencies don't create antinodes; A and a count as different frequencies. However, antinodes can occur at locations that contain antennas. In this diagram, the lone antenna with frequency capital A creates no antinodes but has a lowercase-a-frequency antinode at its location:
 ..........
 ...#......
 #.........
 ....a.....
 ........a.
 .....a....
 ..#.......
 ......A...
 ..........
 ..........
 The first example has antennas with two different frequencies, so the antinodes they create look like this, plus an antinode overlapping the topmost A-frequency antenna:
 ......#....#
 ...#....0...
 ....#0....#.
 ..#....0....
 ....0....#..
 .#....A.....
 ...#........
 #......#....
 ........A...
 .........A..
 ..........#.
 ..........#.
 Because the topmost A-frequency antenna overlaps with a 0-frequency antinode, there are 14 total unique locations that contain an antinode within the bounds of the map.
 Calculate the impact of the signal. How many unique locations within the bounds of the map contain an antinode?
 Your puzzle answer was 269.
 --- Part Two ---
 Watching over your shoulder as you work, one of The Historians asks if you took the effects of resonant harmonics into your calculations.
 Whoops!
 After updating your model, it turns out that an antinode occurs at any grid position exactly in line with at least two antennas of the same frequency, regardless of distance. This means that some of the new antinodes will occur at the position of each antenna (unless that antenna is the only one of its frequency).
 So, these three T-frequency antennas now create many antinodes:
 T....#....
 ...T......
 .T....#...
 .........#
 ..#.......
 ..........
 ...#......
 ..........
 ....#.....
 ..........
 In fact, the three T-frequency antennas are all exactly in line with two antennas, so they are all also antinodes! This brings the total number of antinodes in the above example to 9.
 The original example now has 34 antinodes, including the antinodes that appear on every antenna:
 ##....#....#
 .#.#....0...
 ..#.#0....#.
 ..##...0....
 ....0....#..
 .#...#A....#
 ...#..#.....
 #....#.#....
 ..#.....A...
 ....#....A..
 .#........#.
 ...#......##
 Calculate the impact of the signal using this updated model. How many unique locations within the bounds of the map contain an antinode?
 Your puzzle answer was 949.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,44 @@
 #!/usr/bin/env python3
 import sys
 from itertools import combinations
 from copy import deepcopy
 if __name__ == '__main__':
    mp = [list(line.strip('\n')) for line in open(sys.argv[1])]
    antinodes = deepcopy(mp)
    ah = deepcopy(mp)
    antennas = {}
    for j, y in enumerate(mp): 
        for i, x in enumerate(y):
            if x != '.':
                if x in antennas: antennas[x].append((i,j))
                else: antennas[x] = [(i,j)]
                ah[j][i] = '#'
    for freq, ants in antennas.items():
        for a1, a2 in combinations(ants, 2):
            dx, dy = a2[0] - a1[0], a2[1] - a1[1]
            x1, y1 = a1[0] - dx, a1[1] - dy
            x2, y2 = a2[0] + dx, a2[1] + dy
            if (0 <= x1 < len(mp[0])) and (0 <= y1 < len(mp)):
                antinodes[y1][x1] = '#'
            if (0 <= x2 < len(mp[0])) and (0 <= y2 < len(mp)):
                antinodes[y2][x2] = '#'
            while (0 <= x1 < len(mp[0])) and (0 <= y1 < len(mp)):
                ah[y1][x1] = '#'
                x1, y1 = x1-dx, y1-dy
            while (0 <= x2 < len(mp[0])) and (0 <= y2 < len(mp)):
                ah[y2][x2] = '#'
                x2, y2 = x2+dx, y2+dy
    # challenge 1
    res1 = sum([a.count('#') for a in antinodes])
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    res2 = sum([a.count('#') for a in ah])
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,12 @@
 ............
 ........0...
 .....0......
 .......0....
 ....0.......
 ......A.....
 ............
 ............
 ........A...
 .........A..
 ............
 ............
@@ -0,0 +1,50 @@
 ...............................6.B..........P.....
 n..............M..................................
 ....n.....sM7.............................6.....p.
 ......................Mr......................P...
 .......n.......................................p.E
 .......................6...................p......
 r..............................C........B....P....
 .....................d........6......B4....P......
 .........................7....................4...
 .n......................R..............4..........
 .....N........S.................K.C..........4....
 ...........N..r.....................B....K........
 ..................................................
 ......N.......x.............7.......K.....2....E..
 ...................r..H........R..................
 .....................s....p........C...........2..
 ....3.......................M.....................
 ........k....................H....5...............
 .....x....N................d.5..y................J
 m.....................d7...................J......
 .......exk........................................
 .......x.............5.......R....................
 ..........eY......................................
 ...S.3..............................O.E...J.......
 .......8...H....k...............J.................
 ......S.e.........C.H.....................X.....y.
 ................j..........y.........2............
 ...........e.........k............................
 ......YS...3..............5..........K...XR.......
 ...m..............j.s..........c..................
 .........................j........................
 ...............j..................................
 .....m................................2...........
 .........Y......................................b.
 ..................................................
 .......................h...........b..............
 ............m......D..............d...............
 ........o......D..................................
 ...................................O..............
 ..................................................
 ......8...........................................
 ........D.Y..o...................1................
 .....................................b..9.........
 ........................h..0......................
 .....o......................h..0........b1........
 .........8.............X..........................
 ..........o..........c..........1...........O.....
 ....8....................y0...c...................
 ..............D.......c..................9..0.....
 ............................1..........O..9.......
@@ -0,0 +1,77 @@
 --- Day 9: Disk Fragmenter ---
 Another push of the button leaves you in the familiar hallways of some friendly amphipods! Good thing you each somehow got your own personal mini submarine. The Historians jet away in search of the Chief, mostly by driving directly into walls.
 While The Historians quickly figure out how to pilot these things, you notice an amphipod in the corner struggling with his computer. He's trying to make more contiguous free space by compacting all of the files, but his program isn't working; you offer to help.
 He shows you the disk map (your puzzle input) he's already generated. For example:
 2333133121414131402
 The disk map uses a dense format to represent the layout of files and free space on the disk. The digits alternate between indicating the length of a file and the length of free space.
 So, a disk map like 12345 would represent a one-block file, two blocks of free space, a three-block file, four blocks of free space, and then a five-block file. A disk map like 90909 would represent three nine-block files in a row (with no free space between them).
 Each file on disk also has an ID number based on the order of the files as they appear before they are rearranged, starting with ID 0. So, the disk map 12345 has three files: a one-block file with ID 0, a three-block file with ID 1, and a five-block file with ID 2. Using one character for each block where digits are the file ID and . is free space, the disk map 12345 represents these individual blocks:
 0..111....22222
 The first example above, 2333133121414131402, represents these individual blocks:
 00...111...2...333.44.5555.6666.777.888899
 The amphipod would like to move file blocks one at a time from the end of the disk to the leftmost free space block (until there are no gaps remaining between file blocks). For the disk map 12345, the process looks like this:
 0..111....22222
 02.111....2222.
 022111....222..
 0221112...22...
 02211122..2....
 022111222......
 The first example requires a few more steps:
 00...111...2...333.44.5555.6666.777.888899
 009..111...2...333.44.5555.6666.777.88889.
 0099.111...2...333.44.5555.6666.777.8888..
 00998111...2...333.44.5555.6666.777.888...
 009981118..2...333.44.5555.6666.777.88....
 0099811188.2...333.44.5555.6666.777.8.....
 009981118882...333.44.5555.6666.777.......
 0099811188827..333.44.5555.6666.77........
 00998111888277.333.44.5555.6666.7.........
 009981118882777333.44.5555.6666...........
 009981118882777333644.5555.666............
 00998111888277733364465555.66.............
 0099811188827773336446555566..............
 The final step of this file-compacting process is to update the filesystem checksum. To calculate the checksum, add up the result of multiplying each of these blocks' position with the file ID number it contains. The leftmost block is in position 0. If a block contains free space, skip it instead.
 Continuing the first example, the first few blocks' position multiplied by its file ID number are 0 * 0 = 0, 1 * 0 = 0, 2 * 9 = 18, 3 * 9 = 27, 4 * 8 = 32, and so on. In this example, the checksum is the sum of these, 1928.
 Compact the amphipod's hard drive using the process he requested. What is the resulting filesystem checksum? (Be careful copy/pasting the input for this puzzle; it is a single, very long line.)
 Your puzzle answer was 6288599492129.
 --- Part Two ---
 Upon completion, two things immediately become clear. First, the disk definitely has a lot more contiguous free space, just like the amphipod hoped. Second, the computer is running much more slowly! Maybe introducing all of that file system fragmentation was a bad idea?
 The eager amphipod already has a new plan: rather than move individual blocks, he'd like to try compacting the files on his disk by moving whole files instead.
 This time, attempt to move whole files to the leftmost span of free space blocks that could fit the file. Attempt to move each file exactly once in order of decreasing file ID number starting with the file with the highest file ID number. If there is no span of free space to the left of a file that is large enough to fit the file, the file does not move.
 The first example from above now proceeds differently:
 00...111...2...333.44.5555.6666.777.888899
 0099.111...2...333.44.5555.6666.777.8888..
 0099.1117772...333.44.5555.6666.....8888..
 0099.111777244.333....5555.6666.....8888..
 00992111777.44.333....5555.6666.....8888..
 The process of updating the filesystem checksum is the same; now, this example's checksum would be 2858.
 Start over, now compacting the amphipod's hard drive using this new method instead. What is the resulting filesystem checksum?
 Your puzzle answer was 6321896265143.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,69 @@
 #!/usr/bin/env python3
 import sys
 from copy import deepcopy
 def compress(mem):
    blocks = deepcopy(mem)
    r = len(blocks) - 1
    for p, b in enumerate(blocks):
        if b == None:
            while blocks[r] == None: r -= 1
            # if you check this before moving it obviously does not work
            if p >= r: break
            blocks[p] = blocks[r]
            blocks[r] = None
    return blocks
 def block_compress(free, full, size):
    memory = [None] * size
    for id, pos in reversed(full.items()):
        p, b = pos
        for i in sorted(free.keys()):
            if i >= p: break
            if free[i] < b: continue
            else: p = i
        if p != pos[0]:
            free[p+b] = free[p] - b
            free.pop(p)
            if (pos[0]+b) in free:
                free[pos[0]] = b + free[pos[0]+b]
                free.pop(pos[0]+b)
            else: free[pos[0]] = b
        for j in range (p, p+b): memory[j] = id
    return memory
 def checksum(blocks):
    cs = 0
    for p, b in enumerate(blocks):
        if b == None: continue
        cs += p * b
    return cs
 if __name__ == '__main__':
    blocks = [int(n) for n in list(open(sys.argv[1]).read().strip('\n'))]
    memory = [None] * sum(blocks)
    p, id = 0, 0
    free, full = {}, {}
    for i, b in enumerate(blocks):
        if i % 2 == 0 and b > 0:
            for j in range (p, p+b): memory[j] = id
            full[id] = (p, b)
            id += 1
        else: free[p] = b
        p += b
    # challenge 1
    res1 = checksum(compress(memory))
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    res2 = checksum(block_compress(free, full, sum(blocks)))
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1 @@
 2333133121414131402
@@ -0,0 +1 @@
 6337613674436833695582382518294574934721895775456926659050519789764499137091974516817593123529825470413735998773313821249746165140476827548333979879759812148140743921984858367387865689863575979767978384602135617653231357745451442716162787988827217792125086367824652239497919721686553336289590824034825884491882728622562067753798821229222238807634124749916752577072651378955553992845307918307276391238273773149858396433832536796653365434709657851887396187578778147166906832666361736921666530215593938020386798211757213535118020656880772626853567534823537521847840542462424239748076442664335159933397986757683414553370933017533841909225785682535581657913534751914590354573479543352482677664279490115563578845916997385280799060446627827972734570759842272566609483169585119611369745574079877574611920292074449221344989775049422092807055209772581092501625426515216037533372713253769756161167528724961425674338433856921993913658367042577497436930301681312780243028924226184437743980832960764956152123711024813868188023445957797073319557834842443457408060431584672765711965523592339064155945688420399677786021375036865224718236192794168244218132331879653238514185879711274422704721314129454939677194798258512282384257688549556871296166858544234847196990249480549228468620477732643536689838393877978653367792853453997762592631241338636138577555428914232648823466514071894652137678142034849239193626153640623580414314608933385485612012888459733812386760439427452815938894615323396842132211755866147610694370823973397748963732281746466628818129365432979699941761269528742324281144556379381879602911724569887421245076318843809377436853841020844590787517655729552955292366331147517060174571596182569363324916905792827650803161491453136021278077732064374448109498165846527088615498892332771430958179814356621939482129587840825717107138658080991769344985444860919820564023672497821693314755599976209047988027535412418173944146379780263754526214261017834795745288115763115420595437959121698079541886909440959071743761324933549055785895219883434371956470166162332913626974228698704867909040649016617460867032767038334727116689244913263370265020373034542849904912599647836283459162238825918961705866907222166252213569835943736588468231414457382040649035476988352594163315317533816572151422835818584798813953851735242330898787799654338389819473342688805893283467278648262129884651697935311570182570622882847035353690402079255041929980106820933987229229797544269317587273137530758375497634699083283818553718955173431710764611483099989260285267944525422740201440336499923419596970234642786695265316332262177054801980634357789526362333385795223688334671859856597460299593595342948524369087665258874015146296241079817536554214141611547952197222448591679959466790128097793753463968675487268040477815563380229164213672752215208397193598924987982747832046393487916058272183247276523097304784635757381389468220157974675179325452839698486360399879695439645913991513175369124373993030541020107278592224606843141533658010212677209043325490342134728924457069965191109858378318612965799852635497747794734595236056575848591924766220818282475324396727508923606980769458725299525452612238764560262657775582924569776483862349887068324449156297506644312010698479354773245797667563279586421294657685887842714452735721406358806171998745643329816772286796704744766044588635885245655459774311291948625491629489845688426449351717832871305285577753164547112747414863694575184763986239102380914887326641428026877699225992392096482370418830381415159027914953351339474421536726145911393866697198669419803537365630324763404171851150754014952414412764421984874654951033761733339938562539501446678133468715754993394758543046223523398728955356737781406931429746223633763241354625939226463718409470443784758784373146313839928768614814211356253038934558927790904988453344509018747586929116183883508082777047599959667039225085656443324675746726742070671570757088224324721174549372663665357073604929544480355015119614695352475587896476298629578751175152953418694340237315682094281425544939961496671928705760203087589687943595183450878840612944545990131498239234836114902680973922971833131647941447156647709468389679862137111593607085798425435736388659127388489737118418537272479942534595188821602597196231331570739573219060339186363023917360728735156330123729551057656522303564363389388580584548939620728350317592847949877699604391352991731027339689607733987355581433793686246693841298838454573798145112168184911056903380103939467378844737779330194582116721272190126779182733559651836358413812266428668253391218604697749045971951622863863588909757411613156843452329293637464367447412392465939681589644859070551682234527516285233194458768183747577595703213148321859615511124931012101096951580915748936348216536567577647345618573868040994546908948496431144262585963718473204983249712109511962363539684909657287652765145553168177329822059904713775018257475153084721036958345931122317816828966716917929036331813946978532772968156626894887060457595911112698Line truncated
@@ -0,0 +1,130 @@
 --- Day 10: Hoof It ---
 You all arrive at a Lava Production Facility on a floating island in the sky. As the others begin to search the massive industrial complex, you feel a small nose boop your leg and look down to discover a reindeer wearing a hard hat.
 The reindeer is holding a book titled "Lava Island Hiking Guide". However, when you open the book, you discover that most of it seems to have been scorched by lava! As you're about to ask how you can help, the reindeer brings you a blank topographic map of the surrounding area (your puzzle input) and looks up at you excitedly.
 Perhaps you can help fill in the missing hiking trails?
 The topographic map indicates the height at each position using a scale from 0 (lowest) to 9 (highest). For example:
 0123
 1234
 8765
 9876
 Based on un-scorched scraps of the book, you determine that a good hiking trail is as long as possible and has an even, gradual, uphill slope. For all practical purposes, this means that a hiking trail is any path that starts at height 0, ends at height 9, and always increases by a height of exactly 1 at each step. Hiking trails never include diagonal steps - only up, down, left, or right (from the perspective of the map).
 You look up from the map and notice that the reindeer has helpfully begun to construct a small pile of pencils, markers, rulers, compasses, stickers, and other equipment you might need to update the map with hiking trails.
 A trailhead is any position that starts one or more hiking trails - here, these positions will always have height 0. Assembling more fragments of pages, you establish that a trailhead's score is the number of 9-height positions reachable from that trailhead via a hiking trail. In the above example, the single trailhead in the top left corner has a score of 1 because it can reach a single 9 (the one in the bottom left).
 This trailhead has a score of 2:
 ...0...
 ...1...
 ...2...
 6543456
 7.....7
 8.....8
 9.....9
 (The positions marked . are impassable tiles to simplify these examples; they do not appear on your actual topographic map.)
 This trailhead has a score of 4 because every 9 is reachable via a hiking trail except the one immediately to the left of the trailhead:
 ..90..9
 ...1.98
 ...2..7
 6543456
 765.987
 876....
 987....
 This topographic map contains two trailheads; the trailhead at the top has a score of 1, while the trailhead at the bottom has a score of 2:
 10..9..
 2...8..
 3...7..
 4567654
 ...8..3
 ...9..2
 .....01
 Here's a larger example:
 89010123
 78121874
 87430965
 96549874
 45678903
 32019012
 01329801
 10456732
 This larger example has 9 trailheads. Considering the trailheads in reading order, they have scores of 5, 6, 5, 3, 1, 3, 5, 3, and 5. Adding these scores together, the sum of the scores of all trailheads is 36.
 The reindeer gleefully carries over a protractor and adds it to the pile. What is the sum of the scores of all trailheads on your topographic map?
 Your puzzle answer was 629.
 --- Part Two ---
 The reindeer spends a few minutes reviewing your hiking trail map before realizing something, disappearing for a few minutes, and finally returning with yet another slightly-charred piece of paper.
 The paper describes a second way to measure a trailhead called its rating. A trailhead's rating is the number of distinct hiking trails which begin at that trailhead. For example:
 .....0.
 ..4321.
 ..5..2.
 ..6543.
 ..7..4.
 ..8765.
 ..9....
 The above map has a single trailhead; its rating is 3 because there are exactly three distinct hiking trails which begin at that position:
 .....0.   .....0.   .....0.
 ..4321.   .....1.   .....1.
 ..5....   .....2.   .....2.
 ..6....   ..6543.   .....3.
 ..7....   ..7....   .....4.
 ..8....   ..8....   ..8765.
 ..9....   ..9....   ..9....
 Here is a map containing a single trailhead with rating 13:
 ..90..9
 ...1.98
 ...2..7
 6543456
 765.987
 876....
 987....
 This map contains a single trailhead with rating 227 (because there are 121 distinct hiking trails that lead to the 9 on the right edge and 106 that lead to the 9 on the bottom edge):
 012345
 123456
 234567
 345678
 4.6789
 56789.
 Here's the larger example from before:
 89010123
 78121874
 87430965
 96549874
 45678903
 32019012
 01329801
 10456732
 Considering its trailheads in reading order, they have ratings of 20, 24, 10, 4, 1, 4, 5, 8, and 5. The sum of all trailhead ratings in this larger example topographic map is 81.
 You're not sure how, but the reindeer seems to have crafted some tiny flags out of toothpicks and bits of paper and is using them to mark trailheads on your topographic map. What is the sum of the ratings of all trailheads?
 Your puzzle answer was 1242.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,50 @@
 #!/usr/bin/env python3
 import sys
 def trailhead_score(tm, x, y):
    height = tm[y][x]
    end_positions = set([])
    if height == 9: return set([(x,y)])
    directions = [(0,1), (1,0), (0,-1), (-1,0)]
    for d in directions:
        nx, ny = x+d[0], y+d[1]
        if nx < 0 or ny < 0: continue
        try:
            if tm[ny][nx] - height == 1:
                end_positions = end_positions.union(trailhead_score(tm, nx, ny))
        except IndexError: continue
    return end_positions
 def trailhead_ranking(tm, x, y):
    height = tm[y][x]
    score = 0
    if height == 9: return 1
    directions = [(0,1), (1,0), (0,-1), (-1,0)]
    for d in directions:
        nx, ny = x+d[0], y+d[1]
        if nx < 0 or ny < 0: continue
        try:
            if tm[ny][nx] - height == 1:
                score += trailhead_ranking(tm, nx, ny)
        except IndexError: continue
    return score
 if __name__ == '__main__':
    tm = [[int(l) for l in line.strip('\n')] for line in open(sys.argv[1])]
    res1, res2 = 0, 0
    for j, y in enumerate(tm):
        for i, x in enumerate(y):
            if x == 0:
                res1 += len(trailhead_score(tm, i, j))
                res2 += trailhead_ranking(tm, i, j)
    # challenge 1
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,8 @@
 89010123
 78121874
 87430965
 96549874
 45678903
 32019012
 01329801
 10456732
@@ -0,0 +1,50 @@
 56760198543405456770107687012987873265430701234123
 47891087612514320889298596543236982176321878985054
 30932912503423411978321436760145453089490965076567
 21043803498598502565450345897896334569584324105498
 43256754387687643445601231056787276578675013212389
 50105620896014553238782322348996189432106522301210
 60234211205423469109695210567345023456987101232569
 71454301312345678100556501051269010787832198543478
 82365985407856743291447892340178732696949037643323
 99878876556989856782332309650065341054658743252110
 12389565445845698943221218761234456565789650167087
 03458890330532787892100321052442787074656782108996
 12766721221621056521098478934321692183245891210105
 00875437876521245430167569035630013290194300121234
 21980356985430130101456122128754324389980215432101
 32341245234561221212340033439961015671271326990123
 41239832101676678703121542345872343760362347887654
 50146701098787569254035671096112654854454558943210
 69655410889693452164549389987003569943003967656787
 78789324989582543076678432176124578752112876545490
 49670123476451001289986581065437669801198743454321
 34565404560302654345677893034458954321034652345210
 21670313401212701238766732123361056700125601216787
 10781223304343870349676678901272341811098700305891
 87690433210154901234587565078980110925643212456730
 98521049873269100448996652169765223434756965569821
 83430656794378234567385543258894304589807874321034
 12345690185123247855434789043210113676212981012125
 04396783276030110982329872178901923494345891234596
 65287654896543225671012763561032876587436780989687
 70132108987652334430101654432945214306525891078765
 89945345456701498521012346547876305211014342569854
 67876276789876567677890107236521456523210213410743
 56940189678930438988743298101430567894765104323212
 45434328509821321089654340122334567765894101298701
 50125613410030012127763019831021998568903210345692
 23498701322147897898892123742340867478912653210789
 10567654213456786721089054654356789302801743105678
 01678123402110995437658766789210676211010892234109
 67569016567021874378941043212101245432346781103201
 58454323898134565632332456701234306011015490321232
 49323454234012906701454327890965412102367305410147
 31012365125643812898765410378876543233458216568758
 21009876034756763019034101269989100146569325679669
 21898745129829654323129654352123299656478012784578
 30743231065018760563238765543034788798329983693056
 45656189654323011056769894672145632347012674212147
 01218088745896522349850123283034701456981065100238
 14309893236787631438943210190129892123672578921109
 25456782101896540127654301012010181034543465433212
@@ -0,0 +1,67 @@
 --- Day 11: Plutonian Pebbles ---
 The ancient civilization on Pluto was known for its ability to manipulate spacetime, and while The Historians explore their infinite corridors, you've noticed a strange set of physics-defying stones.
 At first glance, they seem like normal stones: they're arranged in a perfectly straight line, and each stone has a number engraved on it.
 The strange part is that every time you blink, the stones change.
 Sometimes, the number engraved on a stone changes. Other times, a stone might split in two, causing all the other stones to shift over a bit to make room in their perfectly straight line.
 As you observe them for a while, you find that the stones have a consistent behavior. Every time you blink, the stones each simultaneously change according to the first applicable rule in this list:
    If the stone is engraved with the number 0, it is replaced by a stone engraved with the number 1.
    If the stone is engraved with a number that has an even number of digits, it is replaced by two stones. The left half of the digits are engraved on the new left stone, and the right half of the digits are engraved on the new right stone. (The new numbers don't keep extra leading zeroes: 1000 would become stones 10 and 0.)
    If none of the other rules apply, the stone is replaced by a new stone; the old stone's number multiplied by 2024 is engraved on the new stone.
 No matter how the stones change, their order is preserved, and they stay on their perfectly straight line.
 How will the stones evolve if you keep blinking at them? You take a note of the number engraved on each stone in the line (your puzzle input).
 If you have an arrangement of five stones engraved with the numbers 0 1 10 99 999 and you blink once, the stones transform as follows:
    The first stone, 0, becomes a stone marked 1.
    The second stone, 1, is multiplied by 2024 to become 2024.
    The third stone, 10, is split into a stone marked 1 followed by a stone marked 0.
    The fourth stone, 99, is split into two stones marked 9.
    The fifth stone, 999, is replaced by a stone marked 2021976.
 So, after blinking once, your five stones would become an arrangement of seven stones engraved with the numbers 1 2024 1 0 9 9 2021976.
 Here is a longer example:
 Initial arrangement:
 125 17
 After 1 blink:
 253000 1 7
 After 2 blinks:
 253 0 2024 14168
 After 3 blinks:
 512072 1 20 24 28676032
 After 4 blinks:
 512 72 2024 2 0 2 4 2867 6032
 After 5 blinks:
 1036288 7 2 20 24 4048 1 4048 8096 28 67 60 32
 After 6 blinks:
 2097446912 14168 4048 2 0 2 4 40 48 2024 40 48 80 96 2 8 6 7 6 0 3 2
 In this example, after blinking six times, you would have 22 stones. After blinking 25 times, you would have 55312 stones!
 Consider the arrangement of stones in front of you. How many stones will you have after blinking 25 times?
 Your puzzle answer was 224529.
 --- Part Two ---
 The Historians sure are taking a long time. To be fair, the infinite corridors are very large.
 How many stones would you have after blinking a total of 75 times?
 Your puzzle answer was 266820198587914.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,40 @@
 #!/usr/bin/env python3
 import sys
 from copy import deepcopy
 import numpy as np
 def memo(f):
    memo = {}
    def f2(x,y):
        if (x,y) not in memo: memo[(x,y)] = f(x,y)
        return memo[(x,y)]
    return f2
@memo
 def blink(stone, i):
    if i == 0: return 1
    else: i -= 1
    if stone == 0: return blink(1,i)
    elif len(str(stone)) % 2 == 0:
        ds = int(len(str(int(stone)))/2)
        return(blink(int(str(int(stone))[:ds]),i) + blink(int(str(int(stone))[ds:]),i))
    else: return blink(stone*2024, i)
 if __name__ == '__main__':
    stones = [int(n) for n in open(sys.argv[1]).read().strip('\n').split(' ')]
    res1, res2 = 0, 0
    for s in stones:
        res1 += blink(s, 25)
        res2 += blink(s, 75)
    # challenge 1
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1 @@
 0 1 10 99 999
@@ -0,0 +1 @@
 125 17
@@ -0,0 +1 @@
 1117 0 8 21078 2389032 142881 93 385
@@ -0,0 +1,148 @@
 --- Day 12: Garden Groups ---
 Why not search for the Chief Historian near the gardener and his massive farm? There's plenty of food, so The Historians grab something to eat while they search.
 You're about to settle near a complex arrangement of garden plots when some Elves ask if you can lend a hand. They'd like to set up fences around each region of garden plots, but they can't figure out how much fence they need to order or how much it will cost. They hand you a map (your puzzle input) of the garden plots.
 Each garden plot grows only a single type of plant and is indicated by a single letter on your map. When multiple garden plots are growing the same type of plant and are touching (horizontally or vertically), they form a region. For example:
 AAAA
 BBCD
 BBCC
 EEEC
 This 4x4 arrangement includes garden plots growing five different types of plants (labeled A, B, C, D, and E), each grouped into their own region.
 In order to accurately calculate the cost of the fence around a single region, you need to know that region's area and perimeter.
 The area of a region is simply the number of garden plots the region contains. The above map's type A, B, and C plants are each in a region of area 4. The type E plants are in a region of area 3; the type D plants are in a region of area 1.
 Each garden plot is a square and so has four sides. The perimeter of a region is the number of sides of garden plots in the region that do not touch another garden plot in the same region. The type A and C plants are each in a region with perimeter 10. The type B and E plants are each in a region with perimeter 8. The lone D plot forms its own region with perimeter 4.
 Visually indicating the sides of plots in each region that contribute to the perimeter using - and |, the above map's regions' perimeters are measured as follows:
 +-+-+-+-+
 |A A A A|
 +-+-+-+-+     +-+
              |D|
 +-+-+   +-+   +-+
 |B B|   |C|
 +   +   + +-+
 |B B|   |C C|
 +-+-+   +-+ +
          |C|
 +-+-+-+   +-+
 |E E E|
 +-+-+-+
 Plants of the same type can appear in multiple separate regions, and regions can even appear within other regions. For example:
 OOOOO
 OXOXO
 OOOOO
 OXOXO
 OOOOO
 The above map contains five regions, one containing all of the O garden plots, and the other four each containing a single X plot.
 The four X regions each have area 1 and perimeter 4. The region containing 21 type O plants is more complicated; in addition to its outer edge contributing a perimeter of 20, its boundary with each X region contributes an additional 4 to its perimeter, for a total perimeter of 36.
 Due to "modern" business practices, the price of fence required for a region is found by multiplying that region's area by its perimeter. The total price of fencing all regions on a map is found by adding together the price of fence for every region on the map.
 In the first example, region A has price 4 * 10 = 40, region B has price 4 * 8 = 32, region C has price 4 * 10 = 40, region D has price 1 * 4 = 4, and region E has price 3 * 8 = 24. So, the total price for the first example is 140.
 In the second example, the region with all of the O plants has price 21 * 36 = 756, and each of the four smaller X regions has price 1 * 4 = 4, for a total price of 772 (756 + 4 + 4 + 4 + 4).
 Here's a larger example:
 RRRRIICCFF
 RRRRIICCCF
 VVRRRCCFFF
 VVRCCCJFFF
 VVVVCJJCFE
 VVIVCCJJEE
 VVIIICJJEE
 MIIIIIJJEE
 MIIISIJEEE
 MMMISSJEEE
 It contains:
    A region of R plants with price 12 * 18 = 216.
    A region of I plants with price 4 * 8 = 32.
    A region of C plants with price 14 * 28 = 392.
    A region of F plants with price 10 * 18 = 180.
    A region of V plants with price 13 * 20 = 260.
    A region of J plants with price 11 * 20 = 220.
    A region of C plants with price 1 * 4 = 4.
    A region of E plants with price 13 * 18 = 234.
    A region of I plants with price 14 * 22 = 308.
    A region of M plants with price 5 * 12 = 60.
    A region of S plants with price 3 * 8 = 24.
 So, it has a total price of 1930.
 What is the total price of fencing all regions on your map?
 Your puzzle answer was 1415378.
 --- Part Two ---
 Fortunately, the Elves are trying to order so much fence that they qualify for a bulk discount!
 Under the bulk discount, instead of using the perimeter to calculate the price, you need to use the number of sides each region has. Each straight section of fence counts as a side, regardless of how long it is.
 Consider this example again:
 AAAA
 BBCD
 BBCC
 EEEC
 The region containing type A plants has 4 sides, as does each of the regions containing plants of type B, D, and E. However, the more complex region containing the plants of type C has 8 sides!
 Using the new method of calculating the per-region price by multiplying the region's area by its number of sides, regions A through E have prices 16, 16, 32, 4, and 12, respectively, for a total price of 80.
 The second example above (full of type X and O plants) would have a total price of 436.
 Here's a map that includes an E-shaped region full of type E plants:
 EEEEE
 EXXXX
 EEEEE
 EXXXX
 EEEEE
 The E-shaped region has an area of 17 and 12 sides for a price of 204. Including the two regions full of type X plants, this map has a total price of 236.
 This map has a total price of 368:
 AAAAAA
 AAABBA
 AAABBA
 ABBAAA
 ABBAAA
 AAAAAA
 It includes two regions full of type B plants (each with 4 sides) and a single region full of type A plants (with 4 sides on the outside and 8 more sides on the inside, a total of 12 sides). Be especially careful when counting the fence around regions like the one full of type A plants; in particular, each section of fence has an in-side and an out-side, so the fence does not connect across the middle of the region (where the two B regions touch diagonally). (The Elves would have used the Möbius Fencing Company instead, but their contract terms were too one-sided.)
 The larger example from before now has the following updated prices:
    A region of R plants with price 12 * 10 = 120.
    A region of I plants with price 4 * 4 = 16.
    A region of C plants with price 14 * 22 = 308.
    A region of F plants with price 10 * 12 = 120.
    A region of V plants with price 13 * 10 = 130.
    A region of J plants with price 11 * 12 = 132.
    A region of C plants with price 1 * 4 = 4.
    A region of E plants with price 13 * 8 = 104.
    A region of I plants with price 14 * 16 = 224.
    A region of M plants with price 5 * 6 = 30.
    A region of S plants with price 3 * 6 = 18.
 Adding these together produces its new total price of 1206.
 What is the new total price of fencing all regions on your map?
 Your puzzle answer was 862714.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,120 @@
 #!/usr/bin/env python3
 import sys
 def adjacent(x,y,pos):
    dirs = [(0,1), (1,0), (0,-1), (-1,0)]
    for p in pos:
        for d in dirs:
            if p[0] == d[0] + x and p[1] == d[1] + y:
                return True
    return False
 def join(rs):
    if len(rs) == 1: return rs
    removable = []
    for i in range(len(rs)):
        if i in removable:
            continue
        r1 = rs[i]
        for j, r2 in enumerate(rs[i+1:]):
            if j+i+1 in removable: continue
            for r in r1:
                if adjacent(*r,r2):
                    r1 += r2
                    r2 = []
                    removable.append(i+1+j)
                    break
    for i in sorted(removable, reverse=True):
        rs.remove(rs[i])
 if __name__ == '__main__':
    plots = [list(line.strip('\n')) for line in open(sys.argv[1])]
    def fence(p):
        x,y = p
        dirs = [(0,1), (1,0), (0,-1), (-1,0)]
        fences = 0
        for d in dirs:
            nx = d[0] + x
            ny = d[1] + y
            if 0 <= nx < len(plots[0]) and 0 <= ny < len(plots):
                if plots[y][x] != plots[ny][nx]: fences += 1
            else: fences += 1
        return fences
    def disc_fence(region):
        fences = 0
        horizontal = {}
        vertical = {}
        for (x,y) in region:
            v = [(1,0), (-1,0)]
            h = [(0,1), (0,-1)]
            for d in v:
                nx = d[0] + x
                if 0 <= nx < len(plots[0]):
                    if plots[y][x] != plots[y][nx]:
                        if (x, nx) in vertical: vertical[(x,nx)].append(y)
                        else: vertical[(x, nx)] = [y]
                else:
                    if (x, nx) in vertical: vertical[(x,nx)].append(y)
                    else: vertical[(x, nx)] = [y]
            for d in h:
                ny = d[1] + y
                if 0 <= ny < len(plots):
                    if plots[y][x] != plots[ny][x]:
                        if (y,ny) in horizontal: horizontal[(y, ny)].append(x)
                        else: horizontal[(y, ny)] = [x]
                else:
                    if (y,ny) in horizontal: horizontal[(y, ny)].append(x)
                    else: horizontal[(y, ny)] = [x]
        for ys in vertical.values():
            prev = -2
            for y in sorted(ys):
                if y - prev > 1: fences += 1
                prev = y
        for xs in horizontal.values():
            prev = -2
            for x in sorted(xs):
                if x - prev > 1: fences += 1
                prev = x
        return fences
    # 'A': [[(x,y), (x,y),..],...]
    regions = {}
    for y, pls in enumerate(plots):
        for x, p in enumerate(pls):
            if p not in regions:
                regions[p] = [[]]
                regions[p][0].append((x,y))
            else:
                t = False
                for l in regions[p]:
                    if adjacent(x,y,l):
                        l.append((x,y))
                        t = True
                        break
                if not t: regions[p].append([(x,y)])
    res1, res2 = 0, 0
    for p, rs in regions.items():
        join(rs)
        join(rs)
        for r in rs:
            res1 += sum(map(fence,r)) * len(r)
            res2 += disc_fence(r) * len(r)
    # challenge 1
    # 1400060 is too low! -> double join.. not very nice xD
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,10 @@
 RRRRIICCFF
 RRRRIICCCF
 VVRRRCCFFF
 VVRCCCJFFF
 VVVVCJJCFE
 VVIVCCJJEE
 VVIIICJJEE
 MIIIIIJJEE
 MIIISIJEEE
 MMMISSJEEE
@@ -0,0 +1,4 @@
 AAAA
 BBCD
 BBCC
 EEEC
@@ -0,0 +1,5 @@
 OOOOO
 OXOXO
 OOOOO
 OXOXO
 OOOOO
@@ -0,0 +1,5 @@
 EEEEE
 EXXXX
 EEEEE
 EXXXX
 EEEEE
@@ -0,0 +1,140 @@
 IIIIIIIXXXXXXXXXXXXXCCCCCCCCCCCCCCCCCCXXXXXXXQQYYYYYYYYYFFFFFFFFFFFSSSSSUUUOOUUUUUUUUMJJJJMMMGGGGGGGGGGQQQQYYYYYYYYYYYYYYYNQQQQNNNNNNNNNNNNN
 IIIKIIXXXXXXXXXXXXXXCCCCCCCCCCCCCCCCCXXXXXXXXXXYYYYYYYYYYYFFFFFFFFFSSSUUUUUOOUUUUUUUUMJJJJJMMGGGGGGGGGGGGQQQQYYYYYYYYYXYYYNNNNNNNNNNNNZNZZNN
 IIKKIIXXXXXXXXXXXXXXKKCCCCCCCCCCCCCXXXXXXXXXXXXYYYYYYYYYYYKKFFFKFFFSSUUUUUUUOUUUUUUUUUJJJJJJMGGGGGGGGGGGGQQQQQYYYYYYYYYYYYNNNNNNNNNNZZZZZZZZ
 IIKKIIIIXXXXXXXXXXXKKKCCCCCCCCCCCCCCXXXXXXXXXXXXYYYYYYYYYYKKKKKKKKFFSUUUUUUUOUCUUUUUUUJJJJJJGGGGGGGGGGGQGGQQQYYYYYYYYYYYYNNNNNNNNNZZZZZZZZZZ
 KKKKKKIIXXXXXIXXKXXKKKCCCCCCCCCCCCCXXXXXXXXXXXXXXYYYYYYKKKKKKKKKFKFFFFUUUUUUUUCUUUUUUUJJJJJJBBGGGGGGGGGQQQQQYYYYYYYYYYYYYYNNNNNNVNZZZZZZZZZZ
 KKKKKKKKKXXXXXXXXXKKKKCCCBCCCCCCXXXXXXXXXXXXXXXXYYYYYYYKKKKKKKKKFFFFFUUUUUUUUUCUUUUUUUJJJJJJBHGGGGGGGGGGQQQQYYYYYYYYYYYYYNNNNNNZZZZZZZZZZZZZ
 KKKKKKKKKKKXXXXXXKKKKKCCCBBBCCCCCCXXXXXXXXXXXXXYYYYYYYYYYOKKKKKKFFFFUUUUUUUUUCCCCCCNNUJJOJHTHHHGGGGGGGGQQQQQYQYYYYYYYYYWYYYYNNNNZZZZZZZZZZZZ
 KKKKKKKKKKKQQXXXKKKKKKCCBBBBCCCCCCXXXCXXXXXXXXXYYYYYYYYYYKKKKKKKFKKFFUUUUUCCCCCCCCCNNNJOOHHHHHHHGGGGGGGAAQQQQQQQYYYYAYYWWYNNNNNNNDDZZZZZZZZZ
 KKKKKKKKKKKQXXXXKKKKKBBBBBBBBBBCCCCXXCXXXXXXXXXYYYYYYYYYYKKKKKKKKKKFFFUUUUCCCCCCCCCNNNHHHHHHHHHGGGGGGGGGAQQQAAQQYHHLYYHWWYDNNNNDDDDZZZZZZZZZ
 KKKKKKKKKQQQQQXXKKKKKBBBBBBBBBBCCCCXCCCXXXXXCXXCYYYYYYYYYKKKKKKKKKKFKKQQUCCCCCCCCCCNNNHHHHHHHHHHGGGGGGGAAAAAAAAAYHHHHHHHWWDDNNNNDDZZZZZZZZZZ
 KKKKKKKKKKSQQQKKKKKKBBBBBBBBBBBCCCCCCXXXXXXCCCCCCCYYYYYYYKKKKKKKKKKKKKQQQCCCCCCCCCCWWNNHHHHHHHYHGGJJGGGAAAAAAAAMMMHHHHHHWDDDDDDDDDDZZZZZZZZZ
 KKKKKKJKKKSSKKKKKKKKBBBBBBBBBBBCCCCCXXXXXXXCCCCCCYYYCYYKKKKKKKKKKKKKKKQCCCCCCCCCCCWWWWHHHHHHHHHHHJJJAGAAAAAAAAAMMMMHHHHHHDDDDDDDDDDDZZZZZZZZ
 KKKKKKJKKSSSEEKKKKKKKBBBBBBBBBCCCCCCCXXXCCXCCCCCCCCYCCYBKKKKKKKKKKKKKKKLLCLLEECCCWWWWWWHHHHHHHHHHHHHAAAAAAAAAAAAAHHHHHHHHHDPDDDDDDDZZZZZZZZZ
 KKKKKKJJKSSEEKKKKKKBBBBBBBBBBBCCCCCCCCCXCCCCCCCCCCCCCCCCKUUKKKKKKKKKKKKLLLLLEECCEWWWWWWHHHHHHHHHHHHAAAAAAAAAAAAAAAHHHHHHHHHPPDDDDDDZZZZZZZBB
 KKKKKJJJJSSSJJNKKBBBBBBIBBBUUUUUCCCCCCCCCCCCCCCCCCCCCCCUUUKKNNNKKKKRFKKLLLLEEEECEWWWWWWHHHHHHHHHHAAAAAAAAAAAAAAAAHHHHHHHHHHHDDDPDDDDZZZBBBBB
 KKKKJJJJJSSSJJNNKKKBBBIIIIXXXUUYUUCCCCCCCCCCCACCCCCPCCCUUUUNNNNNKKKRRRLLEEEEEEEEEEWWWWWWHHHHHHHHAAAAMAAAAAAAAAAAAAAHHHHHHHHSDDPPDDDDZZZBBBBB
 KKKJJJJJJSSSJJJNNKMBBBBBJXXXXUUYUUCCCCCCCCCCCCCCMCCCYYYYUUNNNNNNRRRRLLLLLEEEEEEEEWWWWWWWWWHHHHHAAAAMMMMMAAAMAAAAAAAHHHHHPPHSPPPPDDDDZZBBBBBB
 KKBBBBJJJSSSJJJJJKBBBBBKJUUUUUUUUUUUCCUCCCCCCHHHHZZZYYYYYUNNNNNNNRRRLLLLEEEEEEEEEEWWWWWWWWHHHHRRAAAMMMMMMMMMMMAAAAAHHHHHPPPSSPPPDPDDZZBBBBBB
 BBBBBBJJJJSSJJJJJQBQBCJKJUUUUUUUUUUUUUUUCCCCCHCHHHHYYYYYYUNYYNLRRRRLLLEEEEEEEEEEEEWWWWWWWWWWWHHRRAAMMMMMMMMMMMQQQQAHHHHPPPPPPPPPPPDBVVBBBBBB
 BBBBBBJJJJSSJJJJJQQQJJJJJJUUUUUUUUUUUUUUCCCHHHHHHHHHHYYYYYNYYLLLRRLLLKKKKEEEEEEEEWWWWWWWWWWWWWWRRAMMMMMMMMMMMMQQQQQQHHPPPPPPPPPPPUBBBBBBBBBB
 BBBBBJJJJJJJJJJJJQJJJJJJJJJJUUUUUUUUUCCCCCCCHHHHHHHHYYYYYYYYLLLLLLLLLKKKKKKKEEEEEEEEEEWWWWWWWWWRRRMMMMMMMMMMMMQQQQQQKRPPPPPPPPPUUUBBBBBBBBBB
 BBBBJJJJJJJJJJJJJJAJJJJJJJJJUUUUUUUUUUCCCCHCCHHHHHYYYYYYYYYYLLLLLLLLKKKKKKKKEEEEEEEEEEWWWWWWWTMRRMMMMMMMMMMMMGOOQQQKKKPPPPPPPPPUUUBBBBBBBBBB
 YYBBBJJJJJJJJJJJJAAJJJJJJJUUUUUUUUUUUCCCCHHHHHHHHHYYYYYYYYYYYLLLLLLLKKKKKKKKKKKEEEEEEEWWWWWWWTMMMMMMMMMMMMMMMOOOQQKKKPPPPPPPPPPUUUBBBBBBBBBB
 YYYYJJJJJJJJJJJJFLAAJJJJJJUUUUUUUUUUUUCCHHLHHHHHYYYYYYYYYYYYLLLLLLLLKOJJJKKKKKEEEEEEEEWWWWWWWTMMMMMEMMMMMMMMMOOOQKKKKKPPPPPPPPPPPBBBUBBBBBBB
 YYYJJJJJJJJJJJJJJLLAJJJJJJJUUUUUUUUUUUUUHHLHHHHHCYYYYYVVVGGGGLLLLLLLKJJJJKKKKKEEEEEEYWWWWWWWWMMMMEEEMMMMMMMOOOOOOWKKKKPOPKKPPPPPPUUUUBBBBBBB
 YYYYYJJJJJJJJJLLLLLLPPJJJJUUUWWWWWUUUUHHHHHHHHHHCYYYYXVVVGGGGLLLLLLLLJJJKKKKKSEEEEEEEWLLLWWWWMMMEEEEMMMMMMMOOOOOOWKKKKKPPKKKPPPPPUUUBBBBBBBB
 YYYYYYJJJJJJJLLLLLLLLPJJUUUUUUWVWWUUUEEHHHHHHHHHHYHYXXXVVVVVLLLLLLLLLLJJKKKKKKEEEEEELLLLWWWAMMMEEEMEMMMMMMMOOOOOOWKKKKKKKKKKPPJJJUUUBBBBBBBA
 YYYYYYLLAJJJJJLLLLLLLLJJJUJJJJWWWWWBUHHHHHHHHHHHHHHHXVVVVVVVVLQQLQQQLJJJKKKKKKEEEEEELLLLLXXAXMMMEKMMMMMMMMMMMOOOKKKKKKKKKKKKKPJJJJJJBBBBBBBB
 YYYYYLLLLJLLLLLLLLLLLLJJJJJJJWWWWWWBBHHHHHHHHHHHHHHHHPVVVVVVVQQQQQQQQQEEEEKKEEEEEOLLLLLLLLXXXXXMKKCCMMMMMMMOOOOOKKKKKKKKKKKKKKKKJJJBBBBBBBBB
 YYYYYLLLLJLLLLLLLLLLLLJJJJJJJWWWWWWWBBHHHHHHHHHHHHHHDDGVVVVVVVQQQQQQQQEEEEEEEEEEEOOLLLLLLLXXXXXMMKKCCMMMMOOOOOOKKKKKKKKKKKKKKKLKBJBBBBBBBBBB
 YYYLLLLLLJLLLLLLLLLLLLLJJJJWWWWWWWWWWBBHHHHHHHHHHHDHDGGVVVVVVVQQQQQQEEEEEEEEEEOOOOOLLLLLLLXMMMMMKKKCCCCMMOOOOOOOOFKKKKKKKKKKKKKKBBBBBBBBBBBF
 YYYLLLLLLLLLLLLLLLLLLJJJJJJJWWWWWWWBBBBBHHHHHHHUUHDDDGGGVVVVVQQQQQQQQEEEEEEEEOOOOOOLLLLLLLXXXXZKKKKCCCEEMOOOOOOFFFQKFKKKKKKKKKKKJBBBBBBBBBBF
 YYYYLLLLLLLLLLLOLOOOLJJOJJJJJXWWWWWBBBBBHHHHHHHHUHDDDGVVVVVVVVQQQQQQQEEEEEEOOOOOOOOOLOLLLKKKKKKKKKCCCEEEOOOOOOOFFFQFFFKKKKKKKKKJJBBBBBBBBBBF
 YYYYYLLLLLLLLLLOOOOOLOOOOJJJXXWWWWBBBBQQHGHHHHHHUHDDDGVVVVVVVVQQQQQQEEEEEEEEXXOOOOOOOOLLGKKKKKKKKKKEEEEEEOEOOFOFFQQFFFFKKKKKKKOZZBBBZBBBBBFF
 YYYYYLLLLGLLLGGGGGOOOOOOOOJXXXWOWWBBBQQQQHHHHHHHHHDVVVVVVVVVVVDQQQQQLEEEEEEOOOOOOOOOOLLKKKKKKKKKKKPPPEEEEEEOOFFFFFFFFFFFFFKKKKOOZUZZZZBBBBBB
 YYYLLLLGGGGLGGGGGOOOOOOOPXJXXXXXBBBBBBQQQQQHHHHHHHDDVDDDVVDDDDDQQLLQLLLYEEEYOOOOOOOOOUKKKKKKKKKKKKKPPPEEEEOOOFFFFFFFFFFFFMMKMKKOZZZGZBBJJJJJ
 YYYLGGLGGGGGGGGGOOOOOOOOOXXXXXXXBBBBBQQQQQQQHHQQDDDDDDDDDDDDDDDLLLLLLLLYYVYYQOOOOOOOOKKKKKKKKKKKLKPPPEEEEEOOOOFTFFFFFFFFFMMMMFKOZZZZZJJJJJJJ
 YYYGGGGGGGGGGGGOOOOOOOOXXXXXXXXXXBIIIIIQQQQQHHQQQQQQQDDDDDDDDDDLLLLLLLLYYYYQQOOOOOOOOOOKKKKKKKKKKPPPEEEEEOOOOOOTFFFFFFFFFFMFFFZZZZZZZZJJJJJN
 YYYQGGGGGGGGGGOOOOOOOOOXXXXXXXXBBBIIIIQQIIIQQQQQQYQQKKKDDDDDDDDLLLLLLLLYYYYQQOOOOOOOOOOKKKKKKKKKKPPPEEEEEEOOOOFFFFFFFFFFFFFFFZZZZZZZZZJJNJJN
 YYYYTTTGGGGGGGOOOOOOOOOOXXXXXXXBBBBIIIIIIIIQQQQQQQQQKKKKKDDDDDDLLLLLLLLYYYYYOOOOOOOOOOOPPPPPPKKKKPPPPEEEEEEEOFFFFFFFFFFFFFFFFFZZZZZZZJJJNNNN
 TTYTTTTTGGGGGGOOOOOOOXXXXXXXXXXXXBIIIIIIIIIQQQQQQQQQKKKDDDDDDDDDLLLLLYYYYYYYOOOOOOOOOOOPPPPPPPPPPPPEEEEEEEEEFFFFFFFFFFFFFFFFFFFFFZZOZZJNNNNN
 TTTTTTTGGDDGGOOOOOOOOXXXXXXXXXXIIIIIIIIIIIIQQQIQQQQQKKKDDDDDDDDLLLLYYYYYYYYYOOOOOOOOOOPPPPPPNNPPPPPPEEEEEEEEEQFFFFFFFFFFFFFFFFFFFZZDDZDDNNNN
 TTTTTTTTGGOOOOOOOOOOOXXXXXXXXXXRIIIIIIIIIIIIIIIQQQKKDDDDDDDDDDDLLLLLYYYYYYYYOOOOOOOOOOOPPPPPNNPPPPPPPEEEEEEEEQEFSRFFFFFFFFFFFFFFFZDDDDDDNNNN
 TTTTTTTTTTOOOOOOOOOOOOOXXXXXXXXXXIIIIIIIIIIIIIQQQQQMMMMMMMDDDDDMMMMMMMHHYYYYOOOOOOOOOOOPPPNNNNPPNPPOPEEEEEEEEEERRRFFFFFFFFGZFZFDDDDDDDDNNNNN
 TTTTTTTTTTTOOOOOOOONONNNNXXXXXXXXIIIIIIIIIIIIIIQQQQMMMMMMMMMMMMMMMMMMMHYYYOOOOOOOOOOOOOPPPNNNNNNNPOOPOOEEEEEEFFRRRZZFFFFFZZZZZZDDDDDDDDTNNRN
 TTTTTTTTTTTQOOOOOOONNNNNXXXXXXXXIIIGIIIIIIIIIIIPPQMMMMMMMMMMMMMMMMMMMMHYYYOOOOOOOOOOOOOPPNNNNNNNNPOOOOOOEEORRRRRRRRZZZZLZZZZZZDDDDDDDDDDDDRR
 TTTTTTQQQTTQOOOOOOODNNNNXNXXXXXXXXXGIIIIIIWIINIMMMMMMMMMMMMMMMMMMMMMMMHYYYYYOOOOOOOOOOONNNNNNNNNNPOOOOOOOOOORRRRRRRZZZZZZZZZZDDDDDDDDDDDDDDD
 TTTTTTQZQQQQQOOOFOOONNNNNNXXXGGXXXXGIIIWWWWWWWIMMMAMMMMMMMMMMMMMMMMMMMHYYYYOOOOOOOOOOOOONNNNNNNNNPOOOOOOOOOORRRRRRRZZZZZZZZZZDDDDDDDDDDDDQQD
 TTTTTQQQQQQQQOEOOONFNNNNNNXGXGGXXXGGGWWWWWWWNWNNMMMMMMMMMMMMMMMMMMMMMMHYYYYOOOOOOOOOOMOMMNNNNNNMMOOOOOOOOOORRRRRRRRRZZZZZZZZZDAADDDDDDDDDQQQ
 TTTTTQQQQQQQQOQQQONNNNNNNNGGXGIGGGGGGWWWWWWWWWNNFAAMMMMMMMMMMMMMMMMMMMYYYTTHHOOOOOOOMMMMMNNNNNNMOOOOOOOOOOOORRRRRRRZZZZZZZZZZZAPDPPPPDDDDQQQ
 TATTTQQQQQQQQQQQQQQQQNNNNNGGGIIIIGGGGGWWWWWWWWWNFAAMMMMMMMMMMMMMMMMMMMYTTTTHHHOOOOOOMMMMMNMMNNMMOOOOOOOOOOOORRRRRRZZZZZZZZZZPPAPPPPPPDDDQQQQ
 AAATTQQQQQQQQQQQQQQQGNNGGGGGIIIIIGIGZZZWWWWWWWWFFAAAAAAAPMMMMMMMMMMMMMTTTTTHHHOOOOOOMMMMMNMMMNMMOOOOOOOOOOOOVRZZRRZZZZZZZZZZPPPPPPPPPPDPQQQQ
 AAAATQQQQQQQQQQQQQQQGGGGGGGIIIIIIIIGZZZWWWWWWWFFFFAFFAAAPMMMMMMMMMMTTTTTTTTHHHOUUUUOMMBBMMMMMMRRRRRRRROOOOOOOOZRRZZZZZZZZZZZPPPPPPPPPPPPQQQQ
 AAAAAQGQQQQQQQQQQQQGGAAAAIIIIIIIIIIIZZZWWWWWFFFFFFFGFAAAPPPPPPPPPPDTTTTTTTTTTTOUUUUUBBLBMMMMMMRRRRRRRROOOOOOOOZZZZZZZZZZZZZZPPPPPPPPPPPPQQQQ
 AAAAAAQQQQQQQQQQQQQAGGAAAIIIIIIIIIIWZZZWWWFFFFFFFFFFFAFAFPPPPPPPTTTTTTTTTTTTTTUUUUUUBBBBBBBBMMRRRRRRRROOOOOOODZDDDZZZZZTTZZPPPPPPPPPPPPPPQQQ
 AAAAAAAAQQQAAAQQQQQAAAAAAAIIIIIIIIIWZZZWWFFFFFFFFFFFFFFFFPPPPPPPPTTTTTTTTTTTTTTTUUUUUBBBBBBMMMRRRRRRRROOOOOODDDFFDDZZZTTTTZPPPPPPPPPPPPPPPQQ
 KAAAAAAAAQAAAAAWWWAAOAAAAAIIIIIIIIIIZZZWWWFFFFFFFFFFFFFFFFPPPPPPPTTTTTTTTTTTRRRRZUZZUBBBBBBMMMRRRRRRRROOOOOOVDDFDDDZZTTTTTTTPPPPPPPPPPPPPQQQ
 KAAAAAAAAAAAAAAAAANNAAAABBIIIIIIIIIIZZZWWWWFFFFFFFFFFFFFFFPPPPPPPTTTTTTTTTTTRRRRZUZZUUBBBBBBMMRRRRRRRROOOOORRRRRRRRDZTTTTTTTPPPPPPPPPPPPPQQQ
 AAAAAAAAAAAAAAAAANNNNBBBBBBIBIBIIIIIZZZWFFWFFFFFFFFFFFFFFPPPPPPPPOOTTTTTTTTTTTTZZZZRRRRRRRRRRRRRRRRRRROOOVVRRRRRRRRDDTTTTTTTPPPPPPPPPPPPPPQQ
 AAAAASAAAAAAAAWWWBBBBBBBBBBBBMBBRIIWZZZWFFFFFFFFFFFFFKFFBPPPPPPOOOOXXTTTTTTTTTTZZZZRRRRRRRRRRRRRRRRRRRVVVVVRRRRRRRRDDTTTTTTTPPPPPPPQPPPQQQQQ
 AAAAASAAAAAAAAWWWBBBBBBBBBBBBBBBWWZZZZZWFTFFFFFFFFKKKKFKPPPPPPPOOOOOXXTTTTTZZZZZZZZRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRDDTTTTTTTTPPPPPPRUPPQQQQQ
 AAASSSAAAAAAAWWWWWBBBBBBBBBBBBBBWWZZZWWWFTTFFFFBKKKKKKKKPPPPPJOOOOOOOOTTTTTZZZZZZZZRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRSTTTTTTTTPPRRRRRRQQQQQQQQ
 SAASSSSSAAAWWWWWBBBBBBBBBBBBBBBVVAZZZWWWMTTFFFFFKKKKKKKKPPPPPJJOOOOOOOTTTTOZZZZZZZZRRRRRRRRRRRRVVVVRRRRRRRRRRRRRRDDSSTTTTTTTTTEERRRRRRQQQQQQ
 SSSSSSSWWWWWWWWWWWBBBBBBBBBBBBBBAAZZZXWMMMTMFFMMMKKKKKKKKPPPPPJOOOOOOOOOTTOZZZZZZZZRRRRRRRRRRRRVVVVRRRRRRRRRRRRRRDSSSTTTTTTTTTERRRRRRRRQQQQQ
 SSSSSSSWWWWWWWWWWWWBBBBBBBBBBBBXXAZZZXMHMMMMMMMMMMKKKKKKKKKKPPPPOOOOOIOOOOODZZZZZZZZZZZRRRRRRRRVVKVRRRRRRRRRRRRRRSSSTTTTTTTTEEERRRRRRRQQQQQQ
 SSSSSSSSWWWWWWWWWWBBBBBBBBBBTBBXXXZZZMMMMMMMMMMMMMKKKKKKKKKKPHOOOOOOOIOOOOODZDDZZZZZZZZRRRRRRRRVVKVRRRRRRRRRRRRRRSSSSSSSTEETEEEERRRRQQQQQQQQ
 SSSSSSSSWWWWOOWWWWWBBBBBBBBBTTBXXXZZZMXMMMMMMMMMMMMKKKKKKKKKOOOOOOOIIIOOODDDDDDZZDZZZZZRRRRRRRRVVVVRRRRRRRRRRRRRRSSSSSSSTEEEEEEELLBRQQQQQQQQ
 SSSSSSSSWWWOOWWWWWBBWVNBBBNBBBBXXXXMMMMMMMMMMMMMMMMMKKKKKKHKHOOOIIIIIIIOODDDDDDDZDZZZZZRRRRRRRRVVIVRRRRRRRRRRRRRRSSSSSSSTEEEEEEELLLRQLQQQQQT
 SSSSSSSWWOOOOWWWWWWWWVBBBBNBBBBXBBBGGGMMMMMMMMMMMMKKKKKKKKHHHHOOIIIIIIIDDDDDDDDDDDZZZZZQQQQQQQQQIIVRRRRRRRRRRRRRRSSSSSSSEEEEEEEEELLLLLTTTTTT
 SSSSSSWWOOOOOWWWVVVVVVVEBBDDBSBBBBBBBBBMMMMMMMMMMMKKKKKKKKHHHHIIIIIIIIIDDDDDDDDDDDDZZQQQQQQQQQQIIIIIUUURRRRRRRRRRSSSSSSREEEEEEEEELLLLLLLTTTT
 SSSSSSWOOOOOOOWWWVVVVVVVDDDDBSBBBBBBBBBBMMMMMMMMMKKKKKKKHHHHHHIIIIIIIIIEDDDDDDDDDDXDQQQQQQQQQQQIIIIIUUUUUUUIISSSSSSSSSSRRERRRREEEELLLLLLTTTT
 SSSSSSWWOOOOOOOOOVVVVVVVDDDDBBBBBBBBBBBBMMMMMMMMMKKKKKKKHHHHHHHIIIHIIIFDDDDDDDDDDDDDQQQQQQQQQQIIIIIIIUUUUUUIISISSSSSSSSRRERRRREEEELLLLLLTTTT
 SSSSSSWWOOOOOOOOOOOVVVVVDDDDBBBBBBBBBBEEEMMMMMMMMKKKKKKPKHHHHHHIHHHHHHDDDDDDDDDDDDDDDDQQQQQQIIIIIIIIIUUUUUUIIIIISSSRRSXRRRRRRRRRBEELLLLLTTTT
 SSSSSWWWOOOOOOOOOOOVVVVVDDDDBBBBBBBBCBBEEMMMMOOOKKKKKKKKKKKKKHHHHHHHDDDDDDDDDDDDDDDDDDQQQQQQMIIIIIIIUUUUUUIIIIIIIRRRRSSRRRRRRRRBBBBBLLLTTTTT
 SSSSSSOOOOOOOOOOOOOVVVVVDDDDDBBBBBBBBEEEEMEMMOOKKKKKKKKKKKKKKHHHHHHHDDDDDDDDDDDDDDDMODQQQQQMMIIIOOOIIUUUOUIIIIIIIIRROOOOOOOOOORBVBBBLLLLLTTG
 SSSSSSSOOOOOOOOOOBOVVVVVDDDDDEEBBBBBBEEEEEEOOOOOKKKKKKFKKKKKKHHHHHHHHDDDDDDDDDDDMDDMMMQQQQMMMMMIOIIIIIUUUUUIIIIIIIRROOOOOOOOOORYBBBBLBBLLLLG
 KSSSSSOOOOOOOOOOOBOFVVDDDDDDDDEBEEBEEEEEEEEEOEOOKLKKKKKKKKKKKHHHHHHDDDDDDDDDDDDDMMMMMMMMQZMMMMMMOOOIIIIUUUIIIIIIIIRROOOOOOOOOOYYBBBBBBBLLLGG
 KSSKKKXXXOOOOOOOOOFFVVDDDDDDDEEEEEEEEEEEEEEEEEEOOKKKKKKKKKKKKKHHHHHDFDDDDDDDDDDDMMMMMMMMZZMMMDDMOOOIIIIUUIIIIIIIIIIROOOOOOOOOOYYBBBBBBQIIIIG
 KSKKKKXXXOOOOOOOHMFFVVDDDDDDDDEEEEEEEEEEEEEEEEEOOKKKKKKKKKKKKKHHHHHDFDDDDDDDDDDEEMMMMMMZZZMMMMMOOOOOOIIUIIIIIIIIIIIROOOOOOOOOOYYBBILBQQIIIII
 KKKKKKKKKQOOOOOOOMFFVVVDDDDDEEEEEEEEEEEEEEEEEEEEOSSSSKKKKKKKKKHHHHHMMUDDDDDDDDTEEEMMMMMMZMMMMMOOOOOOOIIIIIIIIIIIIIRNOOOOOOOOOOYBBBIBBBBIIIII
 KKKKKKKBBGGUOOOOOMMFMGDDDDDDEEEEEEEEEEEEEEEUEEEEOSSSSKKKKKKKQKKHHHHMMUUDDDDDDDTTTTTMMMMZZZZMMMMOOOOOOOOIIIIIIIIIIIRRRRRROOOOPYYIBIIIBIIIIIII
 KKKKKKKBYYGGCCCODMMMMDDDDDDDEEEEEEEEEEEEEEEEEEEEOSSSSKSSSKSKKHHHHMMMMMUUTDDDTQTTTTMMMMMMZZZMMMOOOOOOOBOIIIIIIIIIIIIIRRRROOOOYYYIIIIIIIIIIIII
 KKKKKKKYYYGGCCCTTTTTTPPDDDDDEEEEEEEEEEEEEEEEEEEEOSSSSSSSSSSSSHHHHHMMMMMMTTTTTTTTTXMYMGMMMMZZOOOOOOOOOOIIIIIXIIXXIIIIIIIIMPPPPYIIIIIIIIIIIIII
 KKKKKKEEYYGGCCCTTTTTTTTDDDDDOCCEECCEEEEEEEEEEEEOOSSSSSSSSSSSSHHHHHMQYMMMTTTTTTTTTTTTLGGGOOOOOOOOOOIOOAIIIIIXXXXXXIIIIIMMMMPPPPIIIIIIIIIIIIII
 KKKKKKEEYYYGCCCTTTTTTTTDDDUDCCCVVCCEYYEEEEEEEEEEOOSSSSSSSSSSSYYYYYYYYYPPPPTTTTTTTTSSGGGGGGGOOOOOOIIIOIIIIIIXXXXXXXIIIMMHMMMPMPMIIIIIIIIIIIII
 KKKKKFYYYYYYCCCTTTTTTTTQDDDDCCCCCCCCYYYYEEEEEEEWOWSSSSSSSSSSYYYYYYYYYYYPPPPTTTTTTTKKBBGGGGGGGOOOOIIIIIIIIAAXXXXXXXIMMMMMMMMMMMMMIYIIIIIIIIII
 KKKDFFYYCUCCCCCCTTTTTTTTWWWCCCCCCCCCCCYYYEEEEESWOWWWSSSSSSSSYYYYYYYYYYYYPPPTTTTPPPKKKBBGGGGGGOOOOIIIIIIIIAIXXXXXMIIIIMMMMMMMFFFFFIIIIIIIIIJJ
 DDDDFFFFUUUUCCCCTTTTTTTTWWWCCCCCCCYYYYYYYEEEEEEWWWWWWWWSSSSVVYYYYYYTYYPPPPPPPPPPKPKKKBBKGQGGGOOIIIIIIIIDDDDDDDDDDMMMMMMMMMMHHFFFFIIFIIIIIJJJ
 DDDDDFFUYUUUUTTTTTTTTTTTWWWCCCCCCCYYYYYYYYEEEEKWWWWWWWWWSSSVVYYYYYYYYPPPPPPPPPPPKKKKKKKKQQIGGOIIIIIIIIIDDDDDDDDDDMMMMMMMMMMHHHFFFFFFIIIIIIIJ
 DDDDDFFUUUUUWTTTTTTTTTTTTTWWCCCCCCCYYYYVVEEVEEKWWWWWWWWWWWSVVYYYYYYYPPPPPPOPOPOOKKKKKKKKKQIIIIIIIIIIIIIDDDDDDDDDDMMMMMMMMMMMHFFFFFFFFFFIIFIP
 DDDDDDDCCUUTTTTTTTTTTTTTTTWWCKCCCYYYYVVVDEVVEEKVWQQQQQQWWWSVVVYYYYPPPPPPPPOPOOOKKKKKKKKKKQIIIIIIIIIIIIIDDDDDDDDDDMMMMMMMMMMHHHFFFFFFFFFFFFPP
 DDDDDDDCUUUTTTTTTTTTTTTTTTTWWMMYYYYYYVVVVVVVVVVVVQQQQQQWWWNNNNYYYYYPPPPPOOOOOOKKKKKKKKKRRIIIIIIIIIIIIIHDDDDDDDDDDMMMMMMMMMMMMFFFFFFFFFFFFFFP
 DDDDDDDDUUUTTJTTTTBTTTTTTTTMMQMMMYYYYVVVVVQQQQQQQQQQQQQNBNNNNNNNNNPPPPPPOOOOOOOOKKKKKKKRRRIIIIIIIIIIIAHDDDDDDDDDDMMMMMMMMMMQRFFFFFFFFFFFFPPP
 DDDDDDDDJUUJJJTTBBBBTTTTTTSMMMMMMYYYYVVVVVQQQQQQQQQQQQQNNNNNNNNNNNNPPPPPPOOOOOOOOOOJKKKGGIIIIIIIIIIIAAADDDDDDDDDDFMZMMMMMMMRRRRFFFFFFFFFPPPP
 DDDDDDJJJJUJJBQBBBBBTTTTTTSMMMMMMYYYQQQQQQQQQQQQQQQQQQQGGNNNNNNNNNNNPPPPOOOOOOOOOOOOGGGGGIIIIIIIIIIAAAADDDDDDDDDDFFZMMMMWMMMRRRFFFFFFFFFPPPP
 NDDKDDKJJJJJBBBBBBBTTTTHBTTMMMMMMYYYQQQQQQQQQQQQQQQQQQQGNNNNNNNNNNNNPPPOOOOOOOOOOOYOGGGGGIIIIIIIIIAAAAADDDDDDDDDDFFFFMMMMMMMRRFFFFFFFFFFPPPP
 KDDKKDKWWWJJJBBBBBBBBBBBBMTMMMMMMYYVQQQQQQQQQQQQQQQUGGGGGNNNNNNNNNMNNPOOOOOOOOOOOOYGGGGGGYIGIIIIIAAAAAAAAAAAFFFFFFFFFFFSRRRRRRRPRFFFFFFFPPPP
 KKKKKKKWWWJJJBBBBBBBBBBBBBBMMMMMMYMOVVVVVQQQQQQQQQUUGGNGNNNNNNNZZPZNZZNNOOOOOOOOOOOGGGGGGGGGGIIIAAAAAAAAAAAAAFFFFFFFFFFRRRRRRPPPPFFFPPPPPPPP
 KKKKKKKWWWWJJBBBBBBBBBBBBBBBMMOOMMMOOVVVVQQQQQQUTUUUUUNNNNNNNNZZZZZZZNNNNOCOOOOOOOGGGGGGGGGGGJIAAAAAAAAAAAAAAFFFFFFFFFFFFRRPPPPPPPFPPPPTPTTT
 KKKKKKKWWWWJJBBBBBBBBBBBBBBBBBBOOMOOOOIVGQQQQQQJZUUMMMNNNNNFNNZZZZZFZZNNNOCOOOOOOOGGGGGGGGGGGJJAAAAAAAAAAAAAAAAFFFFFFFFVVRPPPPPPPPPPPPTTTTTT
 KKCKKKKWWWMMJBBBBBBBBBBBBBBBBBBOOOOOOGGGGQQQQQQZZZZZZMMNNNNFNNZZZZZZZZZNNNCOOWOVOGGGLLGGGGGJGJJAAPAAAAAAAAAAAZSSFFFFFFVVVVPPPPPPPPPPPPTTTTTT
 KKCKMKKWWWMMMMBBLBBBBBBBBBBBBBBOOOOOOGGGGQQQQQQZZZZCCNNNFNNFFFFFZZZZZZZNNNCOOOLLLGGGLLLLLLJJJJFFFFAAAAAAAAAAASSSSFFFFVVVVVVPPPPPPPPPPTTTTTTT
 CCCMMPMMMZMMMMBBVBBVVVBBBBBBBBBOOOOOOGGGGQQQQQQHZZZZZNNNFNFFFFFEZZZZZZZZNNCOCCCLLLLLLLLLLLLLJFFFFFDAABAKAKKKBKSSSSFFVVVVVOOPPPPPPPPPPTTTTTTT
 CCCMMMMMMMMMMVVVVVVVVVVBBVBBBBOOOOOOOGGGGQQQQQQGZZZZANNGFFFFFFFFZZZZZZZZCCCCCCCLLLLLLLLLLLLLJJFFFFFKQKKKKKKKKKSSSSSSVVVOOOZPPPPPPPPPPTTTTTTT
 CCCMMMMMMMMMMAAVVVVVVVVVVVOOOOOOOOOGGGGGGQQQQQQRZZZFAAAFFFFFFFFFFZZZZZZZCCCCCCCCLLLLLLLLLLLLLFFFFFFKKKKKKKKKKKKKSSSSSVVOOOZPPPPPPPPITTTTTTTT
 KCMMMMMMMMAAMAAVVTVVVTVVOOOOOOOOOOOGXGGGGQQQQQQZZRZFFFFFFFFFFFFFFFZZZZZZCCCCCCCCLLLLLLLLLLLLLLFFFFFXKKKKKKKKKKKKKKSVVVVVOSPPPPPPPPIIITTTTTTT
 KCKMMMMMMAAAAAAATTTVTTTOOOOOOOGOOGGGGGGGGGGGGGRRRRRFFFFFFFFFFFFFFIFZZZZZCSSCCCCCLLLLLLLLLLLYLFFFFFFFQKKKKKKKKKKKKKKKVVVVOOVVUPPPPIIIITTTTTTT
 KKKKMMKMMAAAAAAAATTTTTTTTTTOOOGOGGGGGGEEGGGGGGGRRFFFFFFFFFFFFFFFFFFZZZZZCSCCCCCCLLLLLLLLLLLLLOOFFFFFQKKKKKKKKKKKKKKKKVVOOVVVPPPPPIIITTTTTTTT
 KKKKKKKKMAAAAAATTTTTTTTTTTTTOOGGGGGGGGGGGGGGGGGRFFFFFFFFFFFFFFFFFFFZZZZVCCCCCCCCCLLLJJJJJJJJJOQFQQQQQQKKKKKKKKKKKKKQVVVOOVVVVPVVIIIIFTTTTTTT
 KKKKKKKKKKKAAAATYRTTTTTTTTTTYYYGGGGGGGGGGGGGGGRRRRFFFFFFFFFFFFFFFFFZZZZVCCCCCCCCCCLLJJJJJJJJJQQQQQQQQKKKKKKKKKKKKKKKKKVVVVVVVPPVIIIIFFTTNTTD
 KKKKKKKKKKKAAAARRRTTTTTTTTYYYYYUGGGGGGGGGGGGGGRVRVZAFFFAAAFFFNFTFFFKKSSCCCCCCCCCCCCCJJJJJJJJJOQQQQQQQKKKKXXXXKKKKKKKKKVVVVVVVVVVIFFFFFFFNFFF
 KKKKKKKKKKKAAAARRRRTTTTRRRRLYYGGGGGGGGGGGGGGGRRVVVAAFFAAAAAFFNNSSSFFSSSSCCCCCCCCCCHHJJJJJJJJJOQQQQQNQKKKKKXXXKKKKKKKKKKVVVSVVVVFFFFFFFFFFFFF
 KKKKKKKKKKKAAAARRRRRTRRRRRRRYYYGGGGGGGGGGGGGGRRVVVAAAAAAAAAFFNSSSSSSSSSSSCCCCCCCCCHZJJJJJJJJJJJJJNNNNKKKKKXXXXKKKWWDDKVVVVSVVVVSSSSFFFFFFFFF
 HKKKKKKKKAAAAARRRRRRRRRRRYYAYYYYGGGGGGGGGGGGRRVUVVPAAAAAAAAWSSSSSSSSSSSSSCCCCCCCHHHHJJJJJJJJJJJJJJJNNNNKKXXXFFFKWWDDDKVVVVSSVVVSSFSSFFFFFFFF
 HKKPKKKKAAAAAARHRRRRRRRRRRYYYYYYYGGGGGGGGGVVVVVVVVPAAAAAAAAAAAASSSSSSSSLLCCCCCCCHHHHJJJJJJJJJJJJJJJNNNNNNNNXNFFDWWDDDDVMVVSSSUVSSFFFFFFFFFFF
 HCCCKKKAAAAGAARRRRRRRRRRRLYAYYYYYYGGGGGGGGVVVVVVVVVAAAAAAAAAASSSSSSSSSSLCCCCCCCCCCHIIIJJJJJJJJJJJJJNNNNNNNNNNAADDDDDDUMMMXXSSUUFFFFFFFFFFFFF
 HCCCCKAAAAGGGGRRRRRRRRRRRLYYYYYYYYYRGGGGGZVVVVVVVVVAAAAAAAAAAASCCCCCCCCCWCCCCCCCYCHYYYJJJJJJJJJJJJJNNNNNNNNNNAWDDDDDDDDMMMMSSUMMFFFFFFFFFFFF
 HCCHHKGGGGGGGGGRRRRRRRRRRRPYYYYYYYRRRRRVVVVVVVVVVVVAAAAAAAAAAASCCCCCCCCCHCHCCCZCYCYYYYJJJJJJJJJJJJJNNNNNNNNNNAWDDDDDDDDDMMMMMMMMFFFFFFFFFFFF
 HHHHHHHGGGGGGGGRRRRRRRRRRRPPYYYYYRRRRRRRRRVVVVVVAAVAAAAAAAAAAAACCCCCCCCCHHHHHHZYYYYYYYJJJJJJJJJJJJJNNNNNNNNNNAAOOOODDDDMMMMMMMMMMMFFFFFFFFFF
 HHHHHHHGGGGGJGGRRRRRRRRRPPPPYYKYYRRRRRRRRRVVVVVVAAAAAAAAAAAEASSCCCCCCCCCHHHHHYYYYYYYYYYYYYYYYPPPJJJNNNNNNNNAAAAOOOODDDMMMMMMMMMMMFFFFFFFFFFF
 HHHHHHHGGGGGGGGRRRRRRRRRRPPFYYKFYFFFRRRRRVVVVVVVAAAAAAAAAAAESSSCCCCCCCCCHHHWHHHYYYYYYYYYYYYPPPPPJJJPPPPNNNAAAAAAAAODHMMMMMMMMMVBFFFFFFFFFFFF
 HHHHHHGGGGGGTTTRYRRRRRTTFTPFFFKFFFFFRRRRRRXVVVVAAAAAAAAAAADSSSSCCCCCCCCCHHHHHHHYYYYYYYYYYYYYYPPPJJJPPPPPPPAAAAAAAAADHHMMMMMMMMMBFFFFFFFKKKKK
 HHHHTGGGGGGGTTTTRRRRRRTTTTTFFFFFFFFFRRRRRXXVXXVVVAAAAAAAAADDDDHHHHHCCCCHHHHHHHHHYYYYYYYYYYYYYPPPPPPPPPPPPFAAAAAAAAAAHHHHHMMMMDBBFFBBBKKKKKKK
 HHHHTTTGTTTTTTTTRRPRRRPPOTTFFFFFFFFFRRRRXXXXXXVVVVVAAAAAAADVDDDHHHHCCCCHHHHHHHHHYYYYYYYYYYHYPPPPPPPPPPPPPAAAAAAAUADAHHHHHHMHHDBBBFBBBBUUKKKY
 HHHHTTTTTTTTTTTTPRPRGGPOOOFFFFFFFFFFFRRRXXXXVVVVVVVAAAVAAAVVDDVHHHHCCCCCCCCCCEYYYYYYYYYYYYYYPPPPPPPPPPPPPAAAAAAAAAAHHHHHHHHHDDDDBBBBBBUUKKKK
 HHHTTTTTTTTTTTTTPPPPPPPOOFFFFFFFFFFFFFFXXXXXVVVVVVVAAVVVVVVVVVVHHHHCCCCCCCCCCTYEYYYYYYYYYYYPPPPPPPPPPRPYPAAAAAAAAAAAHHHHHHHDDDDBBBBBBUUUKKKK
 HHHHYYTTTTTTTTTPPPPPPPPPOOFFFFFFFFFFFFFMMXXXXXVVVVVVVVVVVVGVVWWWHHHCCCCCCCCCCTEEEEEYYYYYYXYPPPPPPPPPBPPPPPAAAAAAAAAHHHHHBBBDYDBBBBBBUUKKKKKK
 HHHHYYYTTTTTTTTPPPPPPPPOOOFFFFFFFFFFFFFMMXXXXXXVVVVVVVVVVVVVVWWWHHHHCCCCCCCCCTEEEEEYYYYQQQQDPPPPPVVPPPPPPPAAAAAAWAHHHHHHBBBYYYBBBBBBBUKKKKKK
 HYYYYYYYYYTTPPPPPPPPPPPPPPFFFFFFFFFFFFMMMXXXXXVVVVVCCCCVVVRRRHHHHHHHCCCCCCCCCTTTTTTYQQYYQQQDDDDPPPVMPMMPPPDAAAAAAAHHHHHBBBBBYYBBBBBBUUUUKKKK
 HHYYYYYYYYYPPPPPPPPPPPRPPPFFRFFVVFFFFVMMXXXXCVVVCCVCXVVVVVRRRHRRHHHSCCCCCCCCCTTTTTTYQQQQQQQDDDDDPVVMMMMMPMAAAAAAAAHHBBBBBBBYYBBBBBUUUUUUKKKK
 HYYYYYYYYYYPPPPPPNNNAPRRRRRRRVVVVVFAVVVMMMXCCCVVCCCCCVVVVVRERRRRRHSSCCCCCCCCCTTTTTTTQQQQQQQQDDDDPVVMMMMMMMMAWAAOOSSSSBBBBBYYBBBBBBUUUUUUUKTK
 YYYYYYYYYYYEEPPPPPNAAPPRRRRRVVVVVVFVVVVVCCXCCCCDCCMMMMMMVVVERRRRRSSSCCCCCCCCCTTTTTQQQQQQQQQQQDDDPZVVMMMMMMMMMMASSSSSVVBBBBBBBBBBBUUUUUUEETTE
 MYYYYYYYYYYYEPPPPPPAAAAARRRRVVVVVVVVVVVVVCCCCCCDCCCCCMMMVDDEEEERRSSSCCCSNTTTTTTTTQQQQQQQQQQQQDDDDZZMMMMMMMMMMMSSSSSSSVBXBBBBBBBBBEEUUUUETTEE
 MYYYYYYYYYYEEPDDAPAAAAAEAAAAVVVVVVVVVVVVVCCCCCCCCCCCCMCCVDDEEEERRSSSCCCSSTTTTTTTYQQQQQQQQQQQQQDDDZZMMMMMMMMMMMMSSSSSSSXXBBBBBBBBBYEEUEEEEEEE
 MYYYYYYYYYYYEAAAAAAAAAAAAAAAVVVVVVVVVVVVVCCCCCCCCCCCCCCCCDEEEEERESSSCCCTTTTTTTTTTQQQQFQQQQQQQQDZZZZZZMZMMMMMMSSSSSSSXXXXXBBBBBBBLEEEEEEEEEEE
 MYYYYYYYYYYYAAAAAAAAAAAAAAAAVVVVVVVVVVVVCCCCCCCCCCCCCCDDDDDDEEEEEESSCCCSTTTTTTTTTQQQQFFQQQQQQQZZZZZZZZZZMMMMMMMYSSSSXXXXXXGBBBBEEEEEEEEEEEEE
 MYYYYYYYYYYMMAAAAAAAAAAAAAAAVVVVVVVVVVVCCCCCCCCCCCCCDDDDDDEEEEEEEESSSSSTTTTTTTTTTTFFFFFQQQQQQQZZZZZZZZZMMMMMMMWSSWWXXXXXXXGGMBBEEEEEEEEEEEEE
 MYYYYYYYYMMMMMAAAAAAAAAAAAAAVVVVVVVVVVCCCCCCCCCCCCCCCDDDDDEEEEEEEESSSSSTTTTTTTTTTFFFFFFFFQQQQQQQZZZZZZJMMMMMMMWSSWXXXXXXXXGMMMMEUEEEEEEEEEEE
 MYYYYYYMMMMMMMAAAAAAAAAUAAVVVVVVVVVVVVCCCCCCCCCCCCCCDDDDDDDEEEEEEEESRSEEETTTTYTFFFFFFFFFFQQQQQQQZZZZZZJMMMMMWWWWWWWXXGXGGGGGMMMEEEEEEEEEEEEE
 YYYXXYYMMMMMMMAAAAAAAAAAAIVVVVVVVVVVVVVCCCCCCCCCCCCCDDDDDDDEEEEEEEEEEEEEETTTTYTFFFFFFFFFFQQQZZZZZZZZZJJJMMMMMMWWWWWXGGGGGGGMMMMEEEEEEEEEEEEE
@@ -0,0 +1,80 @@
 --- Day 13: Claw Contraption ---
 Next up: the lobby of a resort on a tropical island. The Historians take a moment to admire the hexagonal floor tiles before spreading out.
 Fortunately, it looks like the resort has a new arcade! Maybe you can win some prizes from the claw machines?
 The claw machines here are a little unusual. Instead of a joystick or directional buttons to control the claw, these machines have two buttons labeled A and B. Worse, you can't just put in a token and play; it costs 3 tokens to push the A button and 1 token to push the B button.
 With a little experimentation, you figure out that each machine's buttons are configured to move the claw a specific amount to the right (along the X axis) and a specific amount forward (along the Y axis) each time that button is pressed.
 Each machine contains one prize; to win the prize, the claw must be positioned exactly above the prize on both the X and Y axes.
 You wonder: what is the smallest number of tokens you would have to spend to win as many prizes as possible? You assemble a list of every machine's button behavior and prize location (your puzzle input). For example:
 Button A: X+94, Y+34
 Button B: X+22, Y+67
 Prize: X=8400, Y=5400
 Button A: X+26, Y+66
 Button B: X+67, Y+21
 Prize: X=12748, Y=12176
 Button A: X+17, Y+86
 Button B: X+84, Y+37
 Prize: X=7870, Y=6450
 Button A: X+69, Y+23
 Button B: X+27, Y+71
 Prize: X=18641, Y=10279
 This list describes the button configuration and prize location of four different claw machines.
 For now, consider just the first claw machine in the list:
    Pushing the machine's A button would move the claw 94 units along the X axis and 34 units along the Y axis.
    Pushing the B button would move the claw 22 units along the X axis and 67 units along the Y axis.
    The prize is located at X=8400, Y=5400; this means that from the claw's initial position, it would need to move exactly 8400 units along the X axis and exactly 5400 units along the Y axis to be perfectly aligned with the prize in this machine.
 The cheapest way to win the prize is by pushing the A button 80 times and the B button 40 times. This would line up the claw along the X axis (because 80*94 + 40*22 = 8400) and along the Y axis (because 80*34 + 40*67 = 5400). Doing this would cost 80*3 tokens for the A presses and 40*1 for the B presses, a total of 280 tokens.
 For the second and fourth claw machines, there is no combination of A and B presses that will ever win a prize.
 For the third claw machine, the cheapest way to win the prize is by pushing the A button 38 times and the B button 86 times. Doing this would cost a total of 200 tokens.
 So, the most prizes you could possibly win is two; the minimum tokens you would have to spend to win all (two) prizes is 480.
 You estimate that each button would need to be pressed no more than 100 times to win a prize. How else would someone be expected to play?
 Figure out how to win as many prizes as possible. What is the fewest tokens you would have to spend to win all possible prizes?
 Your puzzle answer was 37128.
 --- Part Two ---
 As you go to win the first prize, you discover that the claw is nowhere near where you expected it would be. Due to a unit conversion error in your measurements, the position of every prize is actually 10000000000000 higher on both the X and Y axis!
 Add 10000000000000 to the X and Y position of every prize. After making this change, the example above would now look like this:
 Button A: X+94, Y+34
 Button B: X+22, Y+67
 Prize: X=10000000008400, Y=10000000005400
 Button A: X+26, Y+66
 Button B: X+67, Y+21
 Prize: X=10000000012748, Y=10000000012176
 Button A: X+17, Y+86
 Button B: X+84, Y+37
 Prize: X=10000000007870, Y=10000000006450
 Button A: X+69, Y+23
 Button B: X+27, Y+71
 Prize: X=10000000018641, Y=10000000010279
 Now, it is only possible to win a prize on the second and fourth claw machines. Unfortunately, it will take many more than 100 presses to do so.
 Using the corrected prize coordinates, figure out how to win as many prizes as possible. What is the fewest tokens you would have to spend to win all possible prizes?
 Your puzzle answer was 74914228471331.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,32 @@
 #!/usr/bin/env python3
 import sys, re
 from sympy import solve
 from sympy.abc import x, y
 def prizes(a, b, prize):
    sols = solve([a[0] * x + b[0] * y - prize[0], a[1] * x + b[1] * y - prize[1]], x, y, dict=True)
    if len(sols) > 1: print('help!', sols)
    if int(sols[0][x]) != sols[0][x] or int(sols[0][y]) != sols[0][y]: return 0
    else: return 3*sols[0][x]+sols[0][y]
 if __name__ == '__main__':
    cms = open(sys.argv[1]).read().split('\n\n')
    res1, res2 = 0, 0
    for cm in cms:
        g = re.search(r'Button A: X\+(?P<xa>\d+), Y\+(?P<ya>\d+)\nButton B: X\+(?P<xb>\d+), Y\+(?P<yb>\d+)\nPrize: X=(?P<px>\d+), Y=(?P<py>\d+)', cm)
        button_a = (int(g['xa']), int(g['ya']))
        button_b = (int(g['xb']), int(g['yb']))
        prize = (int(g['px']), int(g['py']))
        res1 += prizes(button_a, button_b, prize)
        prize = (prize[0]+10000000000000, prize[1]+10000000000000)
        res2 += prizes(button_a, button_b, prize)
    # challenge 1
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,15 @@
 Button A: X+94, Y+34
 Button B: X+22, Y+67
 Prize: X=8400, Y=5400
 Button A: X+26, Y+66
 Button B: X+67, Y+21
 Prize: X=12748, Y=12176
 Button A: X+17, Y+86
 Button B: X+84, Y+37
 Prize: X=7870, Y=6450
 Button A: X+69, Y+23
 Button B: X+27, Y+71
 Prize: X=18641, Y=10279
@@ -0,0 +1,131 @@
 --- Day 14: Restroom Redoubt ---
 One of The Historians needs to use the bathroom; fortunately, you know there's a bathroom near an unvisited location on their list, and so you're all quickly teleported directly to the lobby of Easter Bunny Headquarters.
 Unfortunately, EBHQ seems to have "improved" bathroom security again after your last visit. The area outside the bathroom is swarming with robots!
 To get The Historian safely to the bathroom, you'll need a way to predict where the robots will be in the future. Fortunately, they all seem to be moving on the tile floor in predictable straight lines.
 You make a list (your puzzle input) of all of the robots' current positions (p) and velocities (v), one robot per line. For example:
 p=0,4 v=3,-3
 p=6,3 v=-1,-3
 p=10,3 v=-1,2
 p=2,0 v=2,-1
 p=0,0 v=1,3
 p=3,0 v=-2,-2
 p=7,6 v=-1,-3
 p=3,0 v=-1,-2
 p=9,3 v=2,3
 p=7,3 v=-1,2
 p=2,4 v=2,-3
 p=9,5 v=-3,-3
 Each robot's position is given as p=x,y where x represents the number of tiles the robot is from the left wall and y represents the number of tiles from the top wall (when viewed from above). So, a position of p=0,0 means the robot is all the way in the top-left corner.
 Each robot's velocity is given as v=x,y where x and y are given in tiles per second. Positive x means the robot is moving to the right, and positive y means the robot is moving down. So, a velocity of v=1,-2 means that each second, the robot moves 1 tile to the right and 2 tiles up.
 The robots outside the actual bathroom are in a space which is 101 tiles wide and 103 tiles tall (when viewed from above). However, in this example, the robots are in a space which is only 11 tiles wide and 7 tiles tall.
 The robots are good at navigating over/under each other (due to a combination of springs, extendable legs, and quadcopters), so they can share the same tile and don't interact with each other. Visually, the number of robots on each tile in this example looks like this:
 1.12.......
 ...........
 ...........
 ......11.11
 1.1........
 .........1.
 .......1...
 These robots have a unique feature for maximum bathroom security: they can teleport. When a robot would run into an edge of the space they're in, they instead teleport to the other side, effectively wrapping around the edges. Here is what robot p=2,4 v=2,-3 does for the first few seconds:
 Initial state:
 ...........
 ...........
 ...........
 ...........
 ..1........
 ...........
 ...........
 After 1 second:
 ...........
 ....1......
 ...........
 ...........
 ...........
 ...........
 ...........
 After 2 seconds:
 ...........
 ...........
 ...........
 ...........
 ...........
 ......1....
 ...........
 After 3 seconds:
 ...........
 ...........
 ........1..
 ...........
 ...........
 ...........
 ...........
 After 4 seconds:
 ...........
 ...........
 ...........
 ...........
 ...........
 ...........
 ..........1
 After 5 seconds:
 ...........
 ...........
 ...........
 .1.........
 ...........
 ...........
 ...........
 The Historian can't wait much longer, so you don't have to simulate the robots for very long. Where will the robots be after 100 seconds?
 In the above example, the number of robots on each tile after 100 seconds has elapsed looks like this:
 ......2..1.
 ...........
 1..........
 .11........
 .....1.....
 ...12......
 .1....1....
 To determine the safest area, count the number of robots in each quadrant after 100 seconds. Robots that are exactly in the middle (horizontally or vertically) don't count as being in any quadrant, so the only relevant robots are:
 ..... 2..1.
 ..... .....
 1.... .....
 ..... .....
 ...12 .....
 .1... 1....
 In this example, the quadrants contain 1, 3, 4, and 1 robot. Multiplying these together gives a total safety factor of 12.
 Predict the motion of the robots in your list within a space which is 101 tiles wide and 103 tiles tall. What will the safety factor be after exactly 100 seconds have elapsed?
 Your puzzle answer was 209409792.
 --- Part Two ---
 During the bathroom break, someone notices that these robots seem awfully similar to ones built and used at the North Pole. If they're the same type of robots, they should have a hard-coded Easter egg: very rarely, most of the robots should arrange themselves into a picture of a Christmas tree.
 What is the fewest number of seconds that must elapse for the robots to display the Easter egg?
 Your puzzle answer was 8006.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,50 @@
 #!/usr/bin/env python3
 import sys, re
 def show(mp):
    for line in mp:
        print(''.join(line))
 def easter_egg(robots, w, h):
    for steps in range(7000, 10000):
        print('Steps: ', steps)
        m = [['.'] * w for _ in range(h)]
        for r in robots:
            px, py, vx, vy = map(int, r)
            nx = (px + steps*vx)%w
            ny = (py + steps*vy)%h
            m[ny][nx] = 'X'
        show(m)
 if __name__ == '__main__':
    robot = re.compile(r'p=(?P<px>-?\d+),(?P<py>-?\d+) v=(?P<vx>-?\d+),(?P<vy>-?\d+)')
    robots = [robot.search(line.strip('\n')).groups() for line in open(sys.argv[1])]
    # space: 11 x 7 for example and 101 x 103 for real input
    w, h = 101, 103
    steps = 100
    q1, q2, q3, q4 = 0,0,0,0
    for r in robots:
        px, py, vx, vy = map(int,r)
        nx = (px + 100*vx)%w
        ny = (py+100*vy)%h
        if nx in range(0, w//2):
            if ny in range(0,h//2): q1 += 1
            if ny in range(h//2+1,h): q2 += 1
        if nx in range(w//2+1,w):
            if ny in range(0,h//2): q3 += 1
            if ny in range(h//2+1,h): q4 += 1
    # challenge 1
    res1 = q1 * q2 * q3 * q4
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    easter_egg( robots, w, h)
    res2 = "8006" # empirical solution
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,12 @@
 p=0,4 v=3,-3
 p=6,3 v=-1,-3
 p=10,3 v=-1,2
 p=2,0 v=2,-1
 p=0,0 v=1,3
 p=3,0 v=-2,-2
 p=7,6 v=-1,-3
 p=3,0 v=-1,-2
 p=9,3 v=2,3
 p=7,3 v=-1,2
 p=2,4 v=2,-3
 p=9,5 v=-3,-3
@@ -0,0 +1,500 @@
 p=24,25 v=-48,-26
 p=7,8 v=-96,-2
 p=7,80 v=-66,22
 p=5,18 v=25,-98
 p=45,67 v=26,90
 p=54,71 v=3,67
 p=62,66 v=-5,81
 p=5,82 v=-7,-45
 p=66,89 v=93,-43
 p=70,51 v=33,-7
 p=75,59 v=-20,-77
 p=66,40 v=93,55
 p=32,79 v=79,45
 p=99,13 v=-18,50
 p=13,68 v=-43,-53
 p=84,85 v=-69,-65
 p=37,84 v=11,-57
 p=28,10 v=19,-93
 p=78,82 v=-56,36
 p=20,69 v=-3,-62
 p=39,78 v=27,-1
 p=51,87 v=-32,-17
 p=90,26 v=20,66
 p=35,89 v=-11,20
 p=71,2 v=-80,92
 p=41,40 v=-64,-30
 p=38,8 v=-71,54
 p=72,58 v=36,-80
 p=62,97 v=52,83
 p=96,74 v=90,-23
 p=76,75 v=-43,-9
 p=35,95 v=74,13
 p=90,17 v=99,6
 p=61,26 v=17,81
 p=43,71 v=-43,-51
 p=6,18 v=-62,-9
 p=37,62 v=-23,-11
 p=60,97 v=36,-64
 p=54,63 v=-23,-95
 p=76,85 v=24,-4
 p=38,54 v=-38,-95
 p=48,18 v=52,-49
 p=45,36 v=-75,-4
 p=31,87 v=64,50
 p=4,87 v=68,9
 p=25,40 v=99,53
 p=74,18 v=-73,-71
 p=5,22 v=76,65
 p=66,12 v=96,-64
 p=20,71 v=68,-3
 p=3,20 v=4,-77
 p=27,43 v=49,55
 p=25,70 v=-52,-84
 p=90,64 v=39,52
 p=32,69 v=82,88
 p=2,97 v=-78,76
 p=56,6 v=-71,-27
 p=91,31 v=84,-41
 p=25,12 v=-91,-51
 p=7,43 v=-11,59
 p=3,55 v=-6,-44
 p=83,102 v=9,-76
 p=54,40 v=-94,5
 p=3,77 v=80,45
 p=32,6 v=3,-35
 p=14,34 v=-74,-41
 p=16,30 v=-21,-86
 p=34,71 v=-75,-62
 p=79,11 v=67,-10
 p=80,11 v=61,9
 p=14,84 v=-59,-83
 p=73,66 v=-56,3
 p=26,61 v=41,-70
 p=45,35 v=-97,40
 p=84,39 v=-99,55
 p=95,50 v=-66,-56
 p=17,35 v=-33,-74
 p=33,51 v=4,-22
 p=6,77 v=-49,-45
 p=9,61 v=28,85
 p=14,91 v=-70,-12
 p=88,73 v=49,-14
 p=73,39 v=-16,73
 p=68,83 v=25,60
 p=3,31 v=83,62
 p=31,102 v=30,-49
 p=29,29 v=45,-23
 p=47,37 v=97,26
 p=35,46 v=87,39
 p=13,36 v=-74,-37
 p=81,33 v=81,-17
 p=6,20 v=-14,43
 p=94,41 v=89,-72
 p=55,44 v=-91,95
 p=92,87 v=-17,64
 p=54,79 v=-57,-58
 p=53,49 v=-19,-84
 p=25,21 v=56,-82
 p=82,53 v=51,-85
 p=75,27 v=69,-4
 p=21,87 v=61,-6
 p=6,63 v=-74,-77
 p=20,4 v=89,-33
 p=21,25 v=-78,62
 p=24,0 v=-74,43
 p=34,86 v=-43,74
 p=72,83 v=-35,85
 p=47,17 v=41,87
 p=3,73 v=-77,-36
 p=98,96 v=-73,75
 p=66,93 v=-26,20
 p=48,79 v=56,-69
 p=91,89 v=-47,9
 p=49,11 v=96,-47
 p=33,4 v=-86,-16
 p=76,45 v=-46,3
 p=12,28 v=-40,36
 p=64,99 v=-79,-83
 p=19,83 v=-10,-3
 p=87,57 v=84,-33
 p=47,69 v=-64,-58
 p=56,9 v=33,-60
 p=98,94 v=-14,-25
 p=60,59 v=-1,-41
 p=18,91 v=-93,-85
 p=24,21 v=98,-85
 p=51,83 v=-23,45
 p=12,41 v=-41,-34
 p=8,86 v=-55,-50
 p=23,48 v=-11,73
 p=46,24 v=-4,-75
 p=12,82 v=-6,-47
 p=78,37 v=-16,-55
 p=13,59 v=68,-66
 p=63,100 v=44,83
 p=99,66 v=31,-65
 p=21,97 v=17,-7
 p=1,101 v=91,-90
 p=16,74 v=90,8
 p=15,102 v=98,-9
 p=31,34 v=12,91
 p=49,65 v=-8,96
 p=48,62 v=-41,-58
 p=57,13 v=-72,61
 p=82,30 v=-69,47
 p=31,21 v=41,-44
 p=25,93 v=-30,-69
 p=33,45 v=4,-96
 p=57,15 v=59,10
 p=6,74 v=61,-43
 p=9,43 v=-64,51
 p=69,67 v=10,-51
 p=44,93 v=60,93
 p=39,77 v=94,-39
 p=38,86 v=86,12
 p=43,98 v=26,75
 p=64,49 v=-87,-84
 p=13,64 v=42,30
 p=69,91 v=-39,-91
 p=83,100 v=-12,61
 p=28,66 v=-62,-27
 p=15,90 v=-3,-46
 p=0,42 v=27,18
 p=56,99 v=-24,-67
 p=70,68 v=-61,74
 p=7,8 v=-70,35
 p=5,100 v=16,-13
 p=83,49 v=-22,73
 p=63,18 v=64,-56
 p=78,84 v=28,-57
 p=89,39 v=36,26
 p=72,31 v=-80,51
 p=72,88 v=8,70
 p=29,8 v=34,65
 p=36,11 v=-86,39
 p=16,27 v=12,-52
 p=63,63 v=59,63
 p=1,4 v=-21,-79
 p=95,86 v=-81,-79
 p=30,27 v=90,21
 p=17,40 v=81,-5
 p=47,24 v=47,93
 p=4,23 v=31,-49
 p=61,34 v=-42,-78
 p=34,61 v=-62,44
 p=48,18 v=-12,-97
 p=32,81 v=-74,-75
 p=61,15 v=96,-98
 p=8,86 v=87,-54
 p=26,95 v=-63,71
 p=94,61 v=13,48
 p=26,101 v=94,-57
 p=24,102 v=4,2
 p=83,56 v=-56,44
 p=96,37 v=91,-8
 p=60,43 v=-18,5
 p=93,68 v=92,1
 p=79,57 v=-9,77
 p=65,68 v=-16,-51
 p=26,28 v=-44,-80
 p=39,22 v=-75,-23
 p=90,0 v=-73,83
 p=66,88 v=10,75
 p=61,55 v=-87,52
 p=43,2 v=45,68
 p=85,25 v=-91,-12
 p=14,79 v=-50,-20
 p=32,98 v=22,21
 p=85,59 v=74,-5
 p=4,50 v=-14,8
 p=99,85 v=35,-28
 p=76,80 v=-2,64
 p=49,36 v=-8,14
 p=60,65 v=-12,67
 p=4,84 v=-98,-82
 p=0,92 v=-74,-50
 p=88,94 v=26,36
 p=20,37 v=-7,-8
 p=81,28 v=21,-59
 p=95,33 v=-39,36
 p=26,45 v=-86,23
 p=82,19 v=2,-12
 p=85,60 v=32,-44
 p=5,60 v=79,10
 p=53,33 v=-12,62
 p=40,79 v=-71,-47
 p=75,31 v=-95,95
 p=43,2 v=41,-86
 p=17,86 v=-81,82
 p=10,15 v=-31,46
 p=7,74 v=-25,89
 p=69,8 v=-61,32
 p=82,65 v=-39,74
 p=73,101 v=-12,-79
 p=51,9 v=93,-16
 p=95,56 v=13,15
 p=96,67 v=34,29
 p=19,91 v=-31,89
 p=2,43 v=-96,-55
 p=68,60 v=17,-91
 p=17,86 v=8,-43
 p=5,95 v=16,71
 p=49,20 v=37,21
 p=6,67 v=-40,96
 p=47,95 v=-32,-76
 p=45,71 v=-81,2
 p=46,31 v=-34,-89
 p=49,17 v=-79,-97
 p=66,82 v=18,-95
 p=69,86 v=81,-21
 p=5,87 v=-10,-21
 p=84,81 v=47,97
 p=89,9 v=13,-60
 p=34,15 v=-67,-38
 p=51,46 v=-28,-91
 p=94,99 v=-21,-35
 p=15,20 v=3,48
 p=26,72 v=-32,13
 p=80,5 v=-43,-20
 p=64,82 v=-49,-75
 p=56,58 v=-94,81
 p=29,86 v=79,16
 p=98,60 v=-36,4
 p=23,47 v=-37,77
 p=48,66 v=63,78
 p=48,92 v=-97,74
 p=58,86 v=85,27
 p=99,85 v=57,97
 p=98,53 v=-28,-25
 p=72,44 v=-48,31
 p=35,67 v=75,30
 p=22,11 v=38,13
 p=95,41 v=-85,36
 p=3,55 v=-85,-66
 p=50,57 v=-94,11
 p=58,2 v=-42,-64
 p=45,3 v=-97,10
 p=1,30 v=97,-31
 p=75,68 v=13,-58
 p=79,101 v=62,-98
 p=20,26 v=83,25
 p=49,4 v=25,-16
 p=46,54 v=89,7
 p=86,42 v=-43,-81
 p=6,3 v=-99,-5
 p=74,50 v=-61,22
 p=40,13 v=-38,-57
 p=5,54 v=-5,-65
 p=55,66 v=10,-25
 p=52,82 v=-55,-28
 p=70,18 v=-68,-49
 p=54,10 v=-38,-16
 p=79,35 v=54,-45
 p=95,64 v=80,6
 p=88,62 v=-56,78
 p=65,28 v=-39,43
 p=69,29 v=-35,-78
 p=68,99 v=-5,79
 p=37,22 v=30,-49
 p=98,55 v=-92,-84
 p=3,1 v=-10,-64
 p=56,60 v=49,26
 p=38,25 v=-56,91
 p=93,22 v=46,87
 p=97,11 v=13,-86
 p=16,15 v=23,76
 p=34,58 v=45,15
 p=20,59 v=-12,72
 p=30,78 v=-25,50
 p=61,59 v=-53,37
 p=33,2 v=75,-24
 p=36,5 v=81,43
 p=90,93 v=-10,50
 p=60,74 v=14,96
 p=56,40 v=-56,96
 p=79,6 v=77,-71
 p=87,64 v=-2,-62
 p=25,66 v=64,-47
 p=4,13 v=-66,54
 p=47,57 v=67,59
 p=39,64 v=90,-88
 p=81,68 v=-73,52
 p=59,36 v=-42,-89
 p=0,4 v=14,83
 p=20,5 v=-67,-9
 p=100,45 v=20,-44
 p=85,27 v=54,-48
 p=58,54 v=-16,-11
 p=71,4 v=-54,42
 p=22,98 v=83,-46
 p=32,7 v=-26,32
 p=33,52 v=37,-62
 p=82,33 v=-28,14
 p=90,11 v=-88,-97
 p=39,79 v=52,45
 p=60,15 v=70,-79
 p=3,38 v=-70,-29
 p=10,80 v=27,-10
 p=22,22 v=-89,7
 p=23,29 v=-74,49
 p=45,34 v=26,51
 p=59,63 v=-3,41
 p=9,28 v=-82,89
 p=18,42 v=-10,-67
 p=2,80 v=-3,-80
 p=94,73 v=13,89
 p=89,73 v=-50,-40
 p=22,85 v=71,-38
 p=20,99 v=52,-10
 p=40,89 v=52,27
 p=47,99 v=-18,59
 p=71,55 v=25,-47
 p=69,102 v=-31,-64
 p=67,43 v=-91,44
 p=79,27 v=69,-72
 p=43,53 v=89,22
 p=59,30 v=26,-46
 p=53,54 v=37,-33
 p=72,11 v=-80,-27
 p=56,63 v=33,-14
 p=53,61 v=24,86
 p=40,77 v=-17,-66
 p=88,88 v=53,33
 p=40,82 v=56,-76
 p=16,2 v=60,-94
 p=17,83 v=-78,-3
 p=16,99 v=-44,13
 p=88,19 v=-73,40
 p=61,16 v=36,-30
 p=1,90 v=-21,-80
 p=65,92 v=-95,-30
 p=100,98 v=24,31
 p=45,54 v=-42,30
 p=87,60 v=56,-57
 p=97,43 v=75,-96
 p=54,64 v=3,69
 p=73,29 v=-5,84
 p=69,5 v=-99,-27
 p=18,8 v=98,94
 p=9,4 v=92,61
 p=69,50 v=38,34
 p=9,52 v=-85,74
 p=33,16 v=34,-86
 p=38,68 v=15,45
 p=93,82 v=25,17
 p=22,34 v=6,-51
 p=40,81 v=79,-6
 p=62,20 v=23,86
 p=2,21 v=43,-60
 p=19,79 v=-74,38
 p=70,3 v=-20,-81
 p=57,66 v=-4,-22
 p=54,36 v=65,-30
 p=48,83 v=-60,-43
 p=71,41 v=92,-56
 p=90,66 v=-77,-62
 p=65,15 v=-24,-79
 p=49,48 v=-53,81
 p=41,15 v=71,-49
 p=59,58 v=83,18
 p=27,84 v=-38,64
 p=94,34 v=2,36
 p=12,34 v=-55,-30
 p=64,40 v=-27,29
 p=74,28 v=-91,-63
 p=81,86 v=-77,-10
 p=83,26 v=32,47
 p=20,44 v=-63,-96
 p=1,48 v=-51,-11
 p=69,18 v=-5,-82
 p=63,18 v=16,-28
 p=88,1 v=-2,46
 p=80,44 v=2,33
 p=10,35 v=72,10
 p=79,35 v=45,-72
 p=6,13 v=-18,3
 p=40,43 v=41,-4
 p=100,18 v=-51,-93
 p=71,54 v=94,37
 p=4,93 v=50,97
 p=9,56 v=76,-77
 p=89,38 v=-50,92
 p=96,31 v=35,58
 p=73,11 v=96,-86
 p=36,67 v=-60,27
 p=44,77 v=-82,71
 p=67,53 v=96,61
 p=14,82 v=72,42
 p=96,14 v=65,98
 p=91,8 v=78,-72
 p=44,80 v=-22,-67
 p=47,59 v=-75,48
 p=90,52 v=-65,-3
 p=10,41 v=-29,-70
 p=57,90 v=-75,13
 p=42,43 v=67,-85
 p=51,72 v=33,79
 p=33,87 v=60,56
 p=93,55 v=-77,-44
 p=31,29 v=64,-19
 p=91,81 v=21,86
 p=100,99 v=-66,-24
 p=68,90 v=29,23
 p=43,25 v=-6,-49
 p=62,37 v=-98,-74
 p=57,11 v=97,-83
 p=89,85 v=74,14
 p=29,18 v=48,-13
 p=84,92 v=-43,-93
 p=33,5 v=19,94
 p=2,85 v=-58,12
 p=18,95 v=-41,42
 p=75,59 v=34,91
 p=0,56 v=-51,-58
 p=85,10 v=-91,-37
 p=64,20 v=-42,-23
 p=28,30 v=-27,7
 p=18,46 v=-96,73
 p=33,93 v=-93,-53
 p=29,64 v=30,-29
 p=65,53 v=-42,15
 p=26,92 v=11,62
 p=69,34 v=-99,-4
 p=44,15 v=-94,-64
 p=24,42 v=-22,88
 p=37,8 v=41,87
 p=22,77 v=-54,-54
 p=9,13 v=-18,85
 p=90,97 v=46,36
 p=37,61 v=64,93
 p=96,78 v=80,-47
 p=92,62 v=6,74
 p=19,20 v=-44,-23
 p=63,43 v=-16,-4
 p=85,0 v=-73,-64
 p=37,53 v=-11,-81
 p=28,55 v=11,-40
 p=77,22 v=-72,-67
 p=88,86 v=47,60
 p=43,50 v=-19,-95
 p=46,28 v=11,3
 p=16,5 v=28,66
 p=85,85 v=-36,-98
 p=95,15 v=9,17
 p=46,70 v=-64,82
 p=24,49 v=38,-84
 p=94,5 v=-24,-83
 p=59,73 v=-98,49
 p=13,75 v=72,12
 p=68,27 v=-57,-5
 p=13,71 v=-55,-84
 p=57,12 v=-68,28
 p=21,90 v=-45,16
 p=38,4 v=-93,21
 p=66,96 v=-72,-13
 p=34,95 v=-41,-90
 p=85,39 v=-18,-30
 p=3,94 v=9,97
 p=89,12 v=5,-67
 p=44,58 v=-4,-62
@@ -0,0 +1,419 @@
 --- Day 15: Warehouse Woes ---
 You appear back inside your own mini submarine! Each Historian drives their mini submarine in a different direction; maybe the Chief has his own submarine down here somewhere as well?
 You look up to see a vast school of lanternfish swimming past you. On closer inspection, they seem quite anxious, so you drive your mini submarine over to see if you can help.
 Because lanternfish populations grow rapidly, they need a lot of food, and that food needs to be stored somewhere. That's why these lanternfish have built elaborate warehouse complexes operated by robots!
 These lanternfish seem so anxious because they have lost control of the robot that operates one of their most important warehouses! It is currently running amok, pushing around boxes in the warehouse with no regard for lanternfish logistics or lanternfish inventory management strategies.
 Right now, none of the lanternfish are brave enough to swim up to an unpredictable robot so they could shut it off. However, if you could anticipate the robot's movements, maybe they could find a safe option.
 The lanternfish already have a map of the warehouse and a list of movements the robot will attempt to make (your puzzle input). The problem is that the movements will sometimes fail as boxes are shifted around, making the actual movements of the robot difficult to predict.
 For example:
 ##########
 #..O..O.O#
 #......O.#
 #.OO..O.O#
 #..O@..O.#
 #O#..O...#
 #O..O..O.#
 #.OO.O.OO#
 #....O...#
 ##########
 <vv>^<v^>v>^vv^v>v<>v^v<v<^vv<<<^><<><>>v<vvv<>^v^>^<<<><<v<<<v^vv^v>^
 vvv<<^>^v^^><<>>><>^<<><^vv^^<>vvv<>><^^v>^>vv<>v<<<<v<^v>^<^^>>>^<v<v
 ><>vv>v^v^<>><>>>><^^>vv>v<^^^>>v^v^<^^>v^^>v^<^v>v<>>v^v^<v>v^^<^^vv<
 <<v<^>>^^^^>>>v^<>vvv^><v<<<>^^^vv^<vvv>^>v<^^^^v<>^>vvvv><>>v^<<^^^^^
 ^><^><>>><>^^<<^^v>>><^<v>^<vv>>v>>>^v><>^v><<<<v>>v<v<v>vvv>^<><<>^><
 ^>><>^v<><^vvv<^^<><v<<<<<><^v<<<><<<^^<v<^^^><^>>^<v^><<<^>>^v<v^v<v^
 >^>>^v>vv>^<<^v<>><<><<v<<v><>v<^vv<<<>^^v^>^^>>><<^v>>v^v><^^>>^<>vv^
 <><^^>^^^<><vvvvv^v<v<<>^v<v>v<<^><<><<><<<^^<<<^<<>><<><^^^>^^<>^>v<>
 ^^>vv<^v^v<vv>^<><v<^v>^^^>>>^^vvv^>vvv<>>>^<^>>>>>^<<^v>^vvv<>^<><<v>
 v^^>>><<^^<>>^v^<v^vv<>v^<<>^<^v^v><^<<<><<^<v><v<>vv>>v><v^<vv<>v^<<^
 As the robot (@) attempts to move, if there are any boxes (O) in the way, the robot will also attempt to push those boxes. However, if this action would cause the robot or a box to move into a wall (#), nothing moves instead, including the robot. The initial positions of these are shown on the map at the top of the document the lanternfish gave you.
 The rest of the document describes the moves (^ for up, v for down, < for left, > for right) that the robot will attempt to make, in order. (The moves form a single giant sequence; they are broken into multiple lines just to make copy-pasting easier. Newlines within the move sequence should be ignored.)
 Here is a smaller example to get started:
 ########
 #..O.O.#
 ##@.O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 <^^>>>vv<v>>v<<
 Were the robot to attempt the given sequence of moves, it would push around the boxes as follows:
 Initial state:
 ########
 #..O.O.#
 ##@.O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 Move <:
 ########
 #..O.O.#
 ##@.O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 Move ^:
 ########
 #.@O.O.#
 ##..O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 Move ^:
 ########
 #.@O.O.#
 ##..O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 Move >:
 ########
 #..@OO.#
 ##..O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 Move >:
 ########
 #...@OO#
 ##..O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 Move >:
 ########
 #...@OO#
 ##..O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 Move v:
 ########
 #....OO#
 ##..@..#
 #...O..#
 #.#.O..#
 #...O..#
 #...O..#
 ########
 Move v:
 ########
 #....OO#
 ##..@..#
 #...O..#
 #.#.O..#
 #...O..#
 #...O..#
 ########
 Move <:
 ########
 #....OO#
 ##.@...#
 #...O..#
 #.#.O..#
 #...O..#
 #...O..#
 ########
 Move v:
 ########
 #....OO#
 ##.....#
 #..@O..#
 #.#.O..#
 #...O..#
 #...O..#
 ########
 Move >:
 ########
 #....OO#
 ##.....#
 #...@O.#
 #.#.O..#
 #...O..#
 #...O..#
 ########
 Move >:
 ########
 #....OO#
 ##.....#
 #....@O#
 #.#.O..#
 #...O..#
 #...O..#
 ########
 Move v:
 ########
 #....OO#
 ##.....#
 #.....O#
 #.#.O@.#
 #...O..#
 #...O..#
 ########
 Move <:
 ########
 #....OO#
 ##.....#
 #.....O#
 #.#O@..#
 #...O..#
 #...O..#
 ########
 Move <:
 ########
 #....OO#
 ##.....#
 #.....O#
 #.#O@..#
 #...O..#
 #...O..#
 ########
 The larger example has many more moves; after the robot has finished those moves, the warehouse would look like this:
 ##########
 #.O.O.OOO#
 #........#
 #OO......#
 #OO@.....#
 #O#.....O#
 #O.....OO#
 #O.....OO#
 #OO....OO#
 ##########
 The lanternfish use their own custom Goods Positioning System (GPS for short) to track the locations of the boxes. The GPS coordinate of a box is equal to 100 times its distance from the top edge of the map plus its distance from the left edge of the map. (This process does not stop at wall tiles; measure all the way to the edges of the map.)
 So, the box shown below has a distance of 1 from the top edge of the map and 4 from the left edge of the map, resulting in a GPS coordinate of 100 * 1 + 4 = 104.
 #######
 #...O..
 #......
 The lanternfish would like to know the sum of all boxes' GPS coordinates after the robot finishes moving. In the larger example, the sum of all boxes' GPS coordinates is 10092. In the smaller example, the sum is 2028.
 Predict the motion of the robot and boxes in the warehouse. After the robot is finished moving, what is the sum of all boxes' GPS coordinates?
 Your puzzle answer was 1563092.
 --- Part Two ---
 The lanternfish use your information to find a safe moment to swim in and turn off the malfunctioning robot! Just as they start preparing a festival in your honor, reports start coming in that a second warehouse's robot is also malfunctioning.
 This warehouse's layout is surprisingly similar to the one you just helped. There is one key difference: everything except the robot is twice as wide! The robot's list of movements doesn't change.
 To get the wider warehouse's map, start with your original map and, for each tile, make the following changes:
    If the tile is #, the new map contains ## instead.
    If the tile is O, the new map contains [] instead.
    If the tile is ., the new map contains .. instead.
    If the tile is @, the new map contains @. instead.
 This will produce a new warehouse map which is twice as wide and with wide boxes that are represented by []. (The robot does not change size.)
 The larger example from before would now look like this:
 ####################
 ##....[]....[]..[]##
 ##............[]..##
 ##..[][]....[]..[]##
 ##....[]@.....[]..##
 ##[]##....[]......##
 ##[]....[]....[]..##
 ##..[][]..[]..[][]##
 ##........[]......##
 ####################
 Because boxes are now twice as wide but the robot is still the same size and speed, boxes can be aligned such that they directly push two other boxes at once. For example, consider this situation:
 #######
 #...#.#
 #.....#
 #..OO@#
 #..O..#
 #.....#
 #######
 <vv<<^^<<^^
 After appropriately resizing this map, the robot would push around these boxes as follows:
 Initial state:
 ##############
 ##......##..##
 ##..........##
 ##....[][]@.##
 ##....[]....##
 ##..........##
 ##############
 Move <:
 ##############
 ##......##..##
 ##..........##
 ##...[][]@..##
 ##....[]....##
 ##..........##
 ##############
 Move v:
 ##############
 ##......##..##
 ##..........##
 ##...[][]...##
 ##....[].@..##
 ##..........##
 ##############
 Move v:
 ##############
 ##......##..##
 ##..........##
 ##...[][]...##
 ##....[]....##
 ##.......@..##
 ##############
 Move <:
 ##############
 ##......##..##
 ##..........##
 ##...[][]...##
 ##....[]....##
 ##......@...##
 ##############
 Move <:
 ##############
 ##......##..##
 ##..........##
 ##...[][]...##
 ##....[]....##
 ##.....@....##
 ##############
 Move ^:
 ##############
 ##......##..##
 ##...[][]...##
 ##....[]....##
 ##.....@....##
 ##..........##
 ##############
 Move ^:
 ##############
 ##......##..##
 ##...[][]...##
 ##....[]....##
 ##.....@....##
 ##..........##
 ##############
 Move <:
 ##############
 ##......##..##
 ##...[][]...##
 ##....[]....##
 ##....@.....##
 ##..........##
 ##############
 Move <:
 ##############
 ##......##..##
 ##...[][]...##
 ##....[]....##
 ##...@......##
 ##..........##
 ##############
 Move ^:
 ##############
 ##......##..##
 ##...[][]...##
 ##...@[]....##
 ##..........##
 ##..........##
 ##############
 Move ^:
 ##############
 ##...[].##..##
 ##...@.[]...##
 ##....[]....##
 ##..........##
 ##..........##
 ##############
 This warehouse also uses GPS to locate the boxes. For these larger boxes, distances are measured from the edge of the map to the closest edge of the box in question. So, the box shown below has a distance of 1 from the top edge of the map and 5 from the left edge of the map, resulting in a GPS coordinate of 100 * 1 + 5 = 105.
 ##########
 ##...[]...
 ##........
 In the scaled-up version of the larger example from above, after the robot has finished all of its moves, the warehouse would look like this:
 ####################
 ##[].......[].[][]##
 ##[]...........[].##
 ##[]........[][][]##
 ##[]......[]....[]##
 ##..##......[]....##
 ##..[]............##
 ##..@......[].[][]##
 ##......[][]..[]..##
 ####################
 The sum of these boxes' GPS coordinates is 9021.
 Predict the motion of the robot and boxes in this new, scaled-up warehouse. What is the sum of all boxes' final GPS coordinates?
 Your puzzle answer was 1582688.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,112 @@
 #!/usr/bin/env python3
 import sys, os, time
 from copy import deepcopy
 def show(m):
    for line in m:
        sys.stdout.write("\r"+''.join(line)+'\n') 
    sys.stdout.flush()
    time.sleep(0.2)
 def gps(x, y):
    return 100*y + x
 def move_stone(m, x, y, move):
    dir = {'^': (0,-1), '>': (1,0), 'v': (0,1), '<': (-1,0)}
    nx, ny = x+dir[move][0], y+dir[move][1]
    if m[ny][nx] == '#': return
    if m[ny][nx] == 'O': move_stone(m, nx, ny, move)
    if m[ny][nx] == '.':
        m[ny][nx] = 'O'
        m[y][x] = '.'
        return
 def move_box_h(m, x, y, move):
    dir = {'^': (0,-1), '>': (1,0), 'v': (0,1), '<': (-1,0)}
    nx, ny = x+dir[move][0], y
    sym = m[y][x]
    if m[ny][nx] == '#': return
    if m[ny][nx] in ['[', ']']: move_box_h(m, nx, ny, move)
    if m[ny][nx] == '.':
        m[ny][nx] = sym
        m[y][x] = '.'
    return
 def move_box_v(m, x, y, move):
    dir = {'^': (0,-1), '>': (1,0), 'v': (0,1), '<': (-1,0)}
    if m[y][x] == '[': x1, x2 = x, x+1
    else: x1, x2 = x-1, x
    nx1, nx2, ny = x1+dir[move][0], x2+dir[move][0], y+dir[move][1]
    if m[ny][nx1] == '#' or m[ny][nx2] == '#': return m
    if m[ny][nx1] == ']' and m[ny][nx2] == '[':
        mp = deepcopy(m)
        mp = move_box_v(mp, nx1, ny, move)
        mp = move_box_v(mp, nx2, ny, move)
        if mp[ny][nx1] == '.' and mp[ny][nx2] == '.': m = deepcopy(mp)
    elif m[ny][nx1] in ['[', ']']: m = move_box_v(m, nx1, ny, move)
    elif m[ny][nx2] in ['[', ']']: m = move_box_v(m, nx2, ny, move)
    if m[ny][nx1] == '.' and m[ny][nx2] == '.':
        m[ny][nx1] = '['
        m[ny][nx2] = ']'
        m[y][x1] = '.'
        m[y][x2] = '.'
        return m
    return m
 def move(m, x, y, move):
    dir = {'^': (0,-1), '>': (1,0), 'v': (0,1), '<': (-1,0)}
    nx, ny = x+dir[move][0], y+dir[move][1]
    if m[ny][nx] == '#': return m, x, y
    if m[ny][nx] == 'O': move_stone(m, nx, ny, move)
    if m[ny][nx] in ['[',']'] and move in ['v', '^']: 
        m = move_box_v(m, nx, ny, move)
    elif m[ny][nx] in ['[',']'] and move in ['<', '>']: 
        move_box_h(m, nx, ny, move)
    if m[ny][nx] == '.':
        m[ny][nx] = '@'
        m[y][x] = '.'
        return m, nx, ny
    else: return m, x, y
 if __name__ == '__main__':
    mp, moves = open(sys.argv[1]).read().split('\n\n')
    mp = [list(y.strip('\n')) for y in mp.split('\n')]
    moves = list(''.join([m.strip('\n') for m in moves]))
    wm = []
    for y, l in enumerate(mp):
        line = []
        for x, r in enumerate(l):
            if r == '#': line += ['#', '#']
            elif r == '.': line += ['.', '.']
            elif r == 'O': line += ['[', ']']
            elif r == '@':
                wrx, wry = len(line), y
                line += ['@', '.']
                rx, ry = x, y
        wm.append(line)
    for mov in moves:
        mp, rx, ry = move(mp, rx, ry, mov)
        wm, wrx, wry = move(wm, wrx, wry, mov)
    # challenge 1
    res1 = 0
    for y, m in enumerate(mp):
        for x, t in enumerate(m):
            if t == 'O': res1 += gps(x, y)
    print(f"challenge 1:\n{res1}\n")
    # challenge 2
    res2 = 0
    for y, m in enumerate(wm):
        for x, t in enumerate(m):
            if t == '[': res2 += gps(x, y)
    print(f"challenge 2:\n{res2}")
@@ -0,0 +1,21 @@
 ##########
 #..O..O.O#
 #......O.#
 #.OO..O.O#
 #..O@..O.#
 #O#..O...#
 #O..O..O.#
 #.OO.O.OO#
 #....O...#
 ##########
 <vv>^<v^>v>^vv^v>v<>v^v<v<^vv<<<^><<><>>v<vvv<>^v^>^<<<><<v<<<v^vv^v>^
 vvv<<^>^v^^><<>>><>^<<><^vv^^<>vvv<>><^^v>^>vv<>v<<<<v<^v>^<^^>>>^<v<v
 ><>vv>v^v^<>><>>>><^^>vv>v<^^^>>v^v^<^^>v^^>v^<^v>v<>>v^v^<v>v^^<^^vv<
 <<v<^>>^^^^>>>v^<>vvv^><v<<<>^^^vv^<vvv>^>v<^^^^v<>^>vvvv><>>v^<<^^^^^
 ^><^><>>><>^^<<^^v>>><^<v>^<vv>>v>>>^v><>^v><<<<v>>v<v<v>vvv>^<><<>^><
 ^>><>^v<><^vvv<^^<><v<<<<<><^v<<<><<<^^<v<^^^><^>>^<v^><<<^>>^v<v^v<v^
 >^>>^v>vv>^<<^v<>><<><<v<<v><>v<^vv<<<>^^v^>^^>>><<^v>>v^v><^^>>^<>vv^
 <><^^>^^^<><vvvvv^v<v<<>^v<v>v<<^><<><<><<<^^<<<^<<>><<><^^^>^^<>^>v<>
 ^^>vv<^v^v<vv>^<><v<^v>^^^>>>^^vvv^>vvv<>>>^<^>>>>>^<<^v>^vvv<>^<><<v>
 v^^>>><<^^<>>^v^<v^vv<>v^<<>^<^v^v><^<<<><<^<v><v<>vv>>v><v^<vv<>v^<<
@@ -0,0 +1,10 @@
 ########
 #..O.O.#
 ##@.O..#
 #...O..#
 #.#.O..#
 #...O..#
 #......#
 ########
 <^^>>>vv<v>>v<<
@@ -0,0 +1,9 @@
 #######
 #...#.#
 #.....#
 #..OO@#
 #..O..#
 #.....#
 #######
 <vv<<^^<<^^
@@ -0,0 +1,71 @@
 ##################################################
 #..OO..O.O....O...O..O...O.......O...OO##....O.OO#
 #O.#..#OOO#..O..OO...O.O.....OO..O#O#.OOO.....#..#
 #.....O.......OO.#OO....#O.OO.O..OO.O.O.O..##....#
 #.O....O...O#...#...OO..#..O........#O..#..O..O..#
 #O....O...O.O..OO..OO..#OO.#OO.O......##..O..O...#
 #..O.##..#O...O...#.#.O.O..O.#......O..#.#...O...#
 #O.O.........O..O........OO....OO......O.....O#..#
 #...O....#..O..O........O......O.#.....O..O#..O..#
 #.....#OOOOOOO.O.....O.OOO.#.#.........O#O....O..#
 #.........OO#...O.O.#.O..O.....O..#.O..OO.O.#..O.#
 #OOO...............#O.OOO..O#....O.....O...#....O#
 #....O...O.O.#....O.O.O.OO..#......OO..O.OO.O...O#
 #O.O..OO..#...........#O...O.O#...O...O..O..O.O..#
 #OOO...O...#O.O.O...OO..#OO.OO#..O...O..OO...O...#
 #..#........#...O..O...#.O..OO..#O.OO.#O......O..#
 #O.........O.#O.......O.#.O.O....O#...OO...O...OO#
 #.#...O.O....O.O....#...#.O...............O..#.OO#
 #...O.....O..OOO...O..#O..#.......#OO..O..#...O..#
 #OO.O#..O.#..O.#.........OO...O.OO..O....OO.O....#
 #.O..O...O.......OOO....OO....O.OOO........O..O..#
 #O..O..#..O.O.O..O.O.O..#O.......O..OO..O..O.....#
 ##O#.....#.O.....O#......O.........OOO.O...#.OOO.#
 #O.#OO...O..#.O#.O..O.##OO......#..#OO.......O.#O#
 #..O...#..O....OOO..#...@....OO.#.O#..OO......O..#
 #.O#.....O...O..O#..O.OOO.OO.#O.O.O..O....O..OO.##
 #..#.#.O#....#..O.O.OOO.......OO......O.OOO......#
 #.....O....O...#.OO.OOO..#...O..O...O..#..O#OO.O.#
 #OO.O.......O#...O.O......OO....#.O...OO.O..O.O..#
 ##O..O..O##..O..OOOO...O..#O..O.OO.O....O....#.#.#
 ##..OO#O.##...#O.OOO.......O.....O..O..OO.O...OOO#
 #...#..OO.......O.O..OO..........O...OO....OO.O#.#
 #..O.O..#OO.....O.........O#O.#..#..O...O.OO..O..#
 #..O.#O...O............#O.O.O...O..O.O...#...OOO##
 #...#OO.O#.OO.......#.......O..O.##....OO....OOOO#
 #.O.....O..O...O.....#..O.....O...OO.O.O.......OO#
 #...#O...O.O.#O..O..#..OOO#....O##....#OO.#.#OOOO#
 #.O.#OOO......O...O..O.#O.OO..O.......O...O..O..##
 #O.....O.#....O.OOO..O...#O#O....OOOO........#...#
 #O...#.O...O.OO..O.O.O.............OO.O.#...#.O###
 #O....OO.O.OOO#...#..#.....O#O..O..O.O..O#.O...O.#
 #.........O#.##.OO..O..O..##..O........O..OOO....#
 #.#....O.....O.O......O.O.O...OO.O....O..#O..O...#
 #....O##O.O..#....O.OO.O...O..O..OOO..O...#..O...#
 #O#....#.......O..O..#..OO.......O.OO.....OO.O...#
 #O...O#OOO.O......O......OO..O.#.O.....O.O....OOO#
 ##....O##...#O.....O.#........OOOOO#..O....#.O.O.#
 #O...O.....OO.....#O...O......O..OO.O..OOO.O#.O.O#
 #O.O..#.O.O.O.O#.O#....OO.O....O.OO......O#OO...##
 ##################################################
 >><^v><>^v<<vv<>vv><v><<^^>>>>^^><>^<^^vvv>>><><>v^^^^<<^<^><>>>v><><vv^v^<>>>^>><>v>v>^v>>v>>>v^<<^>v^<v<v<v^^>>v<^v>vv^><vvv<<^<><>^<>vv>^>^^^v<^^>v^>v>v<<^>>>^^vvv<>v>><^^<><<>v>>>^<v>vvv^^v>^^v<>^^<^^v^><>>><<<v^>v^>v^><v<^<<>^v^><v<^><^<>>>>v^<><^^>>>^^v^^<v^^>^v^v>>v<><<<vv^<<>^>^v>>v^v^<^<<><^>>^vv>>vvv^<v>v^<vv><^<<<vv>vv>^<^^>v>>^^^<^^^^<<^<<<<<<v>^v>^^v>>>^<>vvvv>>><<><>^v>>vvvvv^<<^<>^>v>>^>>>v<v><>^v^v><<^v<vv<v^<v^v>><^v<^>>^>>v<^v>>v>>v^v^v<<>v>><<><^<v<^<<v<<v>>^vv^vv<>v<v^<^^>^^^vv^<<>^>^^vv>^^<>>v^<v>>>><v<vv<v<^><^v<^vvvv><v>><<><>v<^<^vv<<<>><^<>^<^<>^<vv^>>><v<^^>vv<>v^>^<<^<^>^<^vvv>>v^>>>^<^>vv^<<^^<<>>>v><>v>^>^v>><><^<<>v^>>^<<>^v^<^<><^^^v<>^<v^v^v^<<^^<<<^>v>v<>^^^^^>>v>^v^v>><>^<<>^<v>>v^><v><<<>v^<<^^><>v<<v><vv^^<>v<<v<>>>v>v<<^v<vv><v<v>>^<<>vvv<<^>vv<<vvv>v>^>>^^^^^^^vv^v>>>vvvvv>^>^v<>v>><^v^^v^^v><>vv>><v<^<^>^v>^^^<<^><v>v^<^v<>><<^v^<^><v^v^^><<^v><><^^v<v><v>^><<^<<<^v<^>><>^^vv<^<<^^^^^v<vv^<v<^<<>>>^><^^>^v^v>v^<v^v^v^^>^v>^^><>v^v>vv>^>v^><v<>v<v<
 >>v<v^<vv<v<><<>><^<^<^>><^<>>^>^^<^v^^^<v<^^vv^^^>>^>v>>v<<v^<>vv^<<>^v><v^v>v<>v<<^^^^<^v^<><vv^^v>v<<>>^>>^<^>><<v^^^>vvv>><>>^<^>v><v<<^<<v<<>v<^vv^v<>^>^v^><<<><^v>><v><<^v<<^<^<>>>>v><v>>v<>>><v>v>v<vv<>^>v<^>^^>v^^vvv>v>v<vv>>v<<vv^^v>><>><<<v^vv<<v^^v<<><v>^^>^^vv>v><>v<>>>>vvvvv<>v><<<<>vv>vv><^v^<^<v^<><<^^vv><^<vv^v>>^<>v>><>vv^>v<vv^<^><^v>^>v>^v<v<>^v^<>v><v<>>vv>>vv<^>^<>v><<vv^<><^<>vv><<<<v<<^v>>>^<>>^v^><>v^>^<<^>v^^^vv>>^vv^<<v><>vv^^v><vv><v<vv^<^>>v<><^<^v><^<<<^^<>>vv>>^^<^<<v>><>^^^<vv^<v<vvv><^^>^<<<^>v>^^v<<<vvv<^v<<vv>vvv<^<<v>v^><^^><>^<vv<>^<v<>v><<<v>>v^v<>>^><v><<^v>><v<^<vv^<^>>>>v>^>^<><v^v^v<v^<vvv<<<^<vv^>>v^^<^><^v><^^>v>v^>^>v>>^>>>>^<<v><v<<vv<<<^^<><v<^^<>v>>^^>v><><><<><v><v<>v>>^>^<v<^>^^<^><^^^v>v>>^^<<>>>vvv^v>v^v^<>^^<^><^vv^>^^^>>^><^><>>^<^^<<>>>v<<><v><>vv>^>v>^<^>^^>v<>>vv>^<^^^><vvvv^^vvv<v<<^<v^<<v<^>v><^<>v<<^>v><>>>><>>><^><^><^<<v^^^>^<v><v<>v>v<<^<>^vvv<>v>>>>^v>v^>v<^>^vv<<^<v<>v>vv^^<<vv<^^>v^<><<<v>v>vv^^>v<^^v><<>v>^>>^^v>>^>vvv>^
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 >^>v^^<^<^<<^<vvv^>v^<v^^v>^<v><><^<^>><^v<^^^vv<v>v><^>^><<^^<^^v^>>><<v>vv>><><<<^^>>^^>>^^v<^>v^>><>v^v^>^^<^v><v^>^^<>>>v<<v^v<^>v^<vv^><>><^>v>v<^>>^>>>v^>v<^>^<v>>^<<^<v<vv>^<v<<v>^<v^<^<^v<><v>^vvvv<>>^^^<<<vv<>>v>v><vvv>vv^<^^^^^>v<^^<^>>v^^<>>v^vv^^v^><v^^^^>^^vvv^<^^<>vv^v<>><^^>v^>^v>>>^^>>>^<^v<v>^>vvv^^<><>><^vv>>^><<<<<^>>>^<vv><<v>>>v><><>>><vv>v^<^>>><^v>vv<<^<>v<><>vv><^^<^v^<<^v>^>v^vv<>^v^>v<v<>^<vv^v<^>^<<^<>><^^^<><^vv^v^^v^<vv>>^^>^<<^>>>><>^^<^^<v<<<<v>>>^<>^^>v^^^<v^>>^^v>><v>v^vv<v>^<^<<><v^<^<^^vv^v>><v<<^v<<^^^<<^v<v^>vv^^v>^>^v><^>><<^<v^<vv>v^^v><<^v><^v><>^^>^v><>vv^v><<v^<>^^>v^><><><^v>v^v>vv>^v><><<v<><>^<>vv<^<>^<<v^>vv>^v^^^v<vv^v<<<^<><<<<<v>>^v<v<<<v^v<vv<>^v>^<^<vvv>^>v><v<>v><>vvvv>^^v^^<>>>v>>>^^>vv^v<<^>v^<v><vv<^<>v<<^<<<vv^^>^vv>^<><<>^>>v^v>^<^v^<v<^<<>^<>^^<>^<^><vv<>^<<v<<><^>v><^<><vv<<v^<^>^<>>vvvv>^vv^vvv^^v><<^v<><<<^vv>><<^>^<^>v>v<>>^<^>^^v<^v<<^v>>>><>vv<^<v<^^v<>^<<>v^v><<v<v<>>^>^^<<v>^^<vv>vv<>>^>v>v>>^^v>^^>><v><^><v>>v<><^v<^v<^
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 vv<v>>>^<<vvv^>>v^^v<v^<><^^v<v>^v^<>><>>vv^>>v<<>v^^<<<>vv>^v^>v<>>^>v<^v><<>>^<>^^<<v>^^>>^v><>^^<>vv>><v>vv<><^^v^^<v^>>>^v^^<v><<<>^^vv><>v<><>>^^<v^v^<vv<><vvv><<vv^>^<><><<v^^><^v>v<^^^>>^v^>^><vv<<<>v>^v><v>^>v<v>^vvv<>v>><vv^v><<vv<^^>>v<>^<>v^v^^>^^<vv^><^<^v>v<vvv^><v^<^<v<><>v^^v>v>vvvv^vv^^^>v>vv<>>^<v>^vv^>v^<<v^v><>>v^>vv>vv^>^v^>>^<><^><v>v^^<v<>^><<>v<^>^^<v><>>><vv><^><v<^><<>^<vv^vv>^>^<^^<<^>v^v>^<^<v<v<^<vv^>>vv^^<<^^vv>>><^>vv^><^<><v^<^^v<><^<v<^v^^^v>>vvv>>^^^^><^>>>vv<>>v>>^^>^^>^v^vv^>>^>>v^v^^^v>>><>^<>>><^<v<<<><<>>^^vv<vvvvv^vv><^v^<^<<v^^<>><<>^<^<<<^^>v>v<<<<^v^v<>v^<<>>v<vvv>^vv><>^^^<>v<vv><v<<><vv<^v<>>^v<<<>v^^^^^>v^^<><<<vv^<>v<^v>v<vvv^<^^>^<<<vv<>^>^<v^<><^><^<^<^v><v^^v>^v^><^^<<^><^^>^>>^v>^<>v>>vv>v<<<^^v<^v<v>^>><v><<^^<<^v><<v<^^^^v>>^v>>>v>^^^^v>^<<<><<v<>v^>v^^>^v>v<vvv>^<>v^^v>^>^v><v<^<><^<^^v>>^<<vv<vv>>v^<vv<v><<^>>><<^>^>v<<^><^v^v^>^>^vv^vv>>vv<<<<v><^v><^>>^>>>v>>^>^>><<>><>v^><^^v<<^^v<>^><^v<<<vv><^^^<>^^v^<>>v^<>^^^^<v>>v><<<><>^v>v
 v<v>v<>^>v^<^^<>^^>vvv<>><>>v><><<<>><^^>^<<<v^<vvvvvv<^v>v^>^>^>vv>>^v^v^<><><^><vv<>><<v>^v^vv><<>><vv><>v^<^<>v^<<v>^vv><<v>>vv><^>^>vv^vv<<^v<<v<><vvv<^>vvv><>>v^<^^^v^^<^>^^^>vv>^^<<v<^^>vv^v^<>^<<vvv>v<<>v^vv<v>>v<v<vvv<>>^>>v>vv>^v^^<<v>^vv<>v^>>><^<<>^^v^vv^v><vvv<<>>^^v<^<^<>vv><^>>^<<>v<^v<>^<>v^^vv<>><><^^<^v^<v>>^^<<^^v><^^v^^vvv>v<><^>><^<^<>v>>vv^>>^vv<>>vvv^><v<><>^v<><<>><>^^<<>>v<<^<><<^^v<<^^>><<^<vv<<<v^^<^<>>vv^^>><>>v><^<v^^v<>^>>^v<v^><v><^><<^<v<<vvv<<^>^^><>^<<><<><<^>>vv>>^vv<>^^>>v<>><vvv<<^^v^^<>>vv<><<vv><^^v^><v>^<>^^><^v^>v^v><v<^v^<>^<<>>vv<v<^^vv<v^v^vv<><vvv><vvv^^<vv><<<^v><^vvv<>>^v<>^^<^^<vvv^<v^<<^^>v^<^>v<>>^vv<<>^><>>v^^v>v^<v^^^<>^v^v>>><>^>v<>^^<><^><<<<v<<<vv^>>>v^vv^><>>>v<<<>v<<<v^^>v<^>^v^v<^vv<<<^>v>v^>^^><^>v>v><v><^^v>^vv>>vv^>^<^v>><>vv<vv^<^<v>^v^v>^<>>v^<^^^><v^v^><<<^^>>>^^>><v>^>^^><^^v>v<>vvv><^vv^^^^v^^<^><>>^>>^>^<v^><>^^<v>><vv><vv^>>>^<<v^v<<>>vv^>^>v>v^><v^^^^^^<^>vv<>>^>^>>^>><v>v><><vvvvv<^v^>v^>>v<v<v<^<vv^>>>>^<>^<<v<><^^><
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@@ -0,0 +1,71 @@
 ##################################################
 #..OO..O.O....O...O..O...O.......O...OO##....O.OO#
 #O.#..#OOO#..O..OO...O.O.....OO..O#O#.OOO.....#..#
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 vv<v>vv><><>>^^^>v><<>>><>^<^^^><v<vv^<<<><>><v^v^><>^<v^v^^v<<<v<v^<>>v><<<>>^<<^<v^<<<^>v<v^><<v^v<<^<<v><<^^^><v^>>>>^>>>>^><>v>><v<^^^>v>v>>v>><vv^vvvv>^^<>v><v^>v^^^^<<>vv<v><^>>>>^v>vv^>vvv^v<v>>>v<^^^>v>vvvv<<<vvv>^>^>><>v^<^^vv>^<v<^v><<><v^><<>v><<<><^v^^>><>>^^<v><><>^<<>>>^<>^<v>>^>><>^<<><vv^>^<v^v<><vv<^<<^v>^>><<>><^><<<>>v<>v^^>vvv<<^<>vv^>v<vv<>^><>^>^^v>^><><<v^<>v^v>v>^><><><^<v<^v>^^^>^v<^>^vv^^v<^><>>><^<<v<vv<v><^>>v><^v>>^>v>>v>>>vv><>v<^^v<<<^^<>^v><^<<v<<v<^^v><^^^^^>>vv^<<><>v<^<>vv<<>^^<>^>v<vv^^<^^^<v^>vv>^<<vv>v<v>>^^<>>>^vv^^^^^^><vvv>^><^^>v>^vv<<vv><><<>vv>v<v>^><><^>>v^>^>>v<v>vv<vv<^><v><<v<vv<v><><><v>^<>^<vv<^>^^v>^^^^^^v^>^<v<><^^^^<>><v>>>>>><<>>>>^<vv><<^>>>>>^>vv>^<<<<>v^><v>>>v^<vv^>vv^>>v>>v^^<><^<>v<^<v<<^<^><^><><><^^<^<><>^>v^<^>><>>>^^<vv<<vv>^^v<<vv^^vvvv^v^^<^v^v^^^^><v^<>^^v>vv<<^<>v<^>v><>^^^<<<^><<v>>v<<v<v><v^<v^vv^<vv<>^<^<>^>v>v<<^^^>>^^<>^<<^^<^^v^v^^v^^<^<<v>^<v>^^>^>^>v><^v^^^v>v^v>>v^>^>>v<>^<^v^^^^^<v>v<v^<^><^>>v^<^<<>^v^v^><<v
@@ -0,0 +1,9 @@
 #####
 #...#
 #.O.#
 #.O@#
 #OO.#
 #...#
 #####
 <>^<^<v
@@ -0,0 +1,7 @@
 #######
 #.....#
 #.OO@.#
 #.....#
 #######
 <<
@@ -0,0 +1,8 @@
 #######
 #.....#
 #.O#..#
 #..O@.#
 #.....#
 #######
 <v<<^
@@ -0,0 +1,11 @@
 #######
 #.....#
 #.....#
 #.@O..#
 #..#O.#
 #...O.#
 #..O..#
 #.....#
 #######
 >><vvv>v>^^^
@@ -0,0 +1,13 @@
 ######
 #....#
 #....#
 #.O..#
 #.OO@#
 #.O..#
 #.O..#
 #.O..#
 #....#
 #....#
 ######
 <^^<<vvv
@@ -0,0 +1,11 @@
 ########
 #......#
 #OO....#
 #.O....#
 #.O....#
 ##O....#
 #O..O@.#
 #......#
 ########
 <^^<<>^^^<v
@@ -0,0 +1,141 @@
 --- Day 16: Reindeer Maze ---
 It's time again for the Reindeer Olympics! This year, the big event is the Reindeer Maze, where the Reindeer compete for the lowest score.
 You and The Historians arrive to search for the Chief right as the event is about to start. It wouldn't hurt to watch a little, right?
 The Reindeer start on the Start Tile (marked S) facing East and need to reach the End Tile (marked E). They can move forward one tile at a time (increasing their score by 1 point), but never into a wall (#). They can also rotate clockwise or counterclockwise 90 degrees at a time (increasing their score by 1000 points).
 To figure out the best place to sit, you start by grabbing a map (your puzzle input) from a nearby kiosk. For example:
 ###############
 #.......#....E#
 #.#.###.#.###.#
 #.....#.#...#.#
 #.###.#####.#.#
 #.#.#.......#.#
 #.#.#####.###.#
 #...........#.#
 ###.#.#####.#.#
 #...#.....#.#.#
 #.#.#.###.#.#.#
 #.....#...#.#.#
 #.###.#.#.#.#.#
 #S..#.....#...#
 ###############
 There are many paths through this maze, but taking any of the best paths would incur a score of only 7036. This can be achieved by taking a total of 36 steps forward and turning 90 degrees a total of 7 times:
 ###############
 #.......#....E#
 #.#.###.#.###^#
 #.....#.#...#^#
 #.###.#####.#^#
 #.#.#.......#^#
 #.#.#####.###^#
 #..>>>>>>>>v#^#
 ###^#.#####v#^#
 #>>^#.....#v#^#
 #^#.#.###.#v#^#
 #^....#...#v#^#
 #^###.#.#.#v#^#
 #S..#.....#>>^#
 ###############
 Here's a second example:
 #################
 #...#...#...#..E#
 #.#.#.#.#.#.#.#.#
 #.#.#.#...#...#.#
 #.#.#.#.###.#.#.#
 #...#.#.#.....#.#
 #.#.#.#.#.#####.#
 #.#...#.#.#.....#
 #.#.#####.#.###.#
 #.#.#.......#...#
 #.#.###.#####.###
 #.#.#...#.....#.#
 #.#.#.#####.###.#
 #.#.#.........#.#
 #.#.#.#########.#
 #S#.............#
 #################
 In this maze, the best paths cost 11048 points; following one such path would look like this:
 #################
 #...#...#...#..E#
 #.#.#.#.#.#.#.#^#
 #.#.#.#...#...#^#
 #.#.#.#.###.#.#^#
 #>>v#.#.#.....#^#
 #^#v#.#.#.#####^#
 #^#v..#.#.#>>>>^#
 #^#v#####.#^###.#
 #^#v#..>>>>^#...#
 #^#v###^#####.###
 #^#v#>>^#.....#.#
 #^#v#^#####.###.#
 #^#v#^........#.#
 #^#v#^#########.#
 #S#>>^..........#
 #################
 Note that the path shown above includes one 90 degree turn as the very first move, rotating the Reindeer from facing East to facing North.
 Analyze your map carefully. What is the lowest score a Reindeer could possibly get?
 Your puzzle answer was 143564.
 --- Part Two ---
 Now that you know what the best paths look like, you can figure out the best spot to sit.
 Every non-wall tile (S, ., or E) is equipped with places to sit along the edges of the tile. While determining which of these tiles would be the best spot to sit depends on a whole bunch of factors (how comfortable the seats are, how far away the bathrooms are, whether there's a pillar blocking your view, etc.), the most important factor is whether the tile is on one of the best paths through the maze. If you sit somewhere else, you'd miss all the action!
 So, you'll need to determine which tiles are part of any best path through the maze, including the S and E tiles.
 In the first example, there are 45 tiles (marked O) that are part of at least one of the various best paths through the maze:
 ###############
 #.......#....O#
 #.#.###.#.###O#
 #.....#.#...#O#
 #.###.#####.#O#
 #.#.#.......#O#
 #.#.#####.###O#
 #..OOOOOOOOO#O#
 ###O#O#####O#O#
 #OOO#O....#O#O#
 #O#O#O###.#O#O#
 #OOOOO#...#O#O#
 #O###.#.#.#O#O#
 #O..#.....#OOO#
 ###############
 In the second example, there are 64 tiles that are part of at least one of the best paths:
 #################
 #...#...#...#..O#
 #.#.#.#.#.#.#.#O#
 #.#.#.#...#...#O#
 #.#.#.#.###.#.#O#
 #OOO#.#.#.....#O#
 #O#O#.#.#.#####O#
 #O#O..#.#.#OOOOO#
 #O#O#####.#O###O#
 #O#O#..OOOOO#OOO#
 #O#O###O#####O###
 #O#O#OOO#..OOO#.#
 #O#O#O#####O###.#
 #O#O#OOOOOOO..#.#
 #O#O#O#########.#
 #O#OOO..........#
 #################
 Analyze your map further. How many tiles are part of at least one of the best paths through the maze?
 Your puzzle answer was 593.
 Both parts of this puzzle are complete! They provide two gold stars: **
@@ -0,0 +1,75 @@
 #!/usr/bin/env python3
 import sys, math
 import numpy as np
 def dijkstra(graph, v, a):
    Q = [n for n in graph.keys()]
    lq = len(Q)
    while len(Q) > 0:
        u = min([u for u in Q], key=lambda x: a[x])
        Q.remove(u)
        for vo in graph[u]:
            if vo in Q:
                distance_update(graph, u,vo,a,v)
    return v, a
 def distance_update(g, u, vo, a, v):
    dist = 1 if vo[2] == u[2] else 1000
    alt = a[u] + dist
    # joining the sets does not work because we never remove the older nodes!
    if alt <= a[vo]:
        if alt < a[vo]:
            v[vo] = set([])
            a[vo] = alt
        v[vo].add(u)
        v[vo] = v[vo].union(set(v[u]))
 def count_set(edges, lab):
    edg = set([])
    for e in edges:
        edg.add((e[0], e[1]))
        lab[e[1]][e[0]] = 'O'
    return edg
 if __name__ == '__main__':
    lab = [list(line.strip('\n')) for line in open(sys.argv[1])]
    rot90 = {(0,-1): [(-1,0),(1,0)], (1,0): [(0,-1),(0,1)], (0,1): [(1,0),(-1, 0)], (-1,0): [(0,1),(0,-1)]}
    start = (1, len(lab)-2, (1,0))
    end = (len(lab[0])-2, 1, (0,-1))
    graph = {}
    distance = {}
    pred = {}
    for y, l in enumerate(lab):
        for x, f in enumerate(lab[y]):
            if f == '#': continue
            for d in [(0,1), (0,-1), (1,0), (-1,0)]:
                distance[(x,y,d)] = math.inf
                pred[(x,y,d)] = set([])
                graph[(x,y,d)] = []
                for d1 in rot90[d]:
                    if not lab[y+d1[1]][x+d1[0]] == '#': graph[(x,y,d)].append((x,y,d1))
                if lab[y+d[1]][x+d[0]] != '#':
                    graph[(x,y,d)].append((x+d[0], y+d[1], d))
    distance[start] = 0
    v1, a1 = dijkstra(graph, pred, distance)
    d1 = count_set(v1[end], lab)
    # challenge 1
    res1 = a1[end]
    print(f"challenge 1:\n{res1}\n")
    # challenge 2, needed some reddit help again...
    d1.add((end[0],end[1]))
    d1.add((start[0], start[1]))
    res2 = len(d1)
    print(f"challenge 2:\n{res2}")
    for line in lab:
      print(''.join(line))
@@ -0,0 +1,15 @@
 ###############
 #.......#....E#
 #.#.###.#.###.#
 #.....#.#...#.#
 #.###.#####.#.#
 #.#.#.......#.#
 #.#.#####.###.#
 #...........#.#
 ###.#.#####.#.#
 #...#.....#.#.#
 #.#.#.###.#.#.#
 #.....#...#.#.#
 #.###.#.#.#.#.#
 #S..#.....#...#
 ###############
@@ -0,0 +1,17 @@
 #################
 #...#...#...#..E#
 #.#.#.#.#.#.#.#.#
 #.#.#.#...#...#.#
 #.#.#.#.###.#.#.#
 #...#.#.#.....#.#
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 #.#.#.......#...#
 #.#.###.#####.###
 #.#.#...#.....#.#
 #.#.#.#####.###.#
 #.#.#.........#.#
 #.#.#.#########.#
 #S#.............#
 #################
@@ -0,0 +1,141 @@
 #############################################################################################################################################
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 #############################################################################################################################################
@@ -0,0 +1,79 @@
 from collections import namedtuple
 from math import sqrt
 from pathlib import Path
 Point = namedtuple('Point', ['y', 'x'])
 Node = namedtuple('Node', ['p', 'd'])
 # set up inputs
 text = Path('input').read_text('utf-8')
 board_lines = text.splitlines()
 width = len(board_lines[0])
 board = list(map(list, board_lines))
 start, end = Point(*divmod(text.find('S'), width + 1)), Point(*divmod(text.find('E'), width + 1))
 # simple cost heuristic based on distance to end node
 def cost_heuristic(p: Point) -> float:
    return sqrt((p.x - end.x) ** 2 + (p.y - end.y) ** 2)
 # walks path backwards, scans for nodes with incoming paths of equal cost, and traverses all recursively
 def equal_cost_backtrace(parent: dict, node_cost: dict, current: Node) -> set[Point]:
    last_direction = current.d
    trace = {current.p}
    while current := parent.get(current):
        trace.add(current.p)
        for d in map(lambda o: (current.d + o) & 3, [1, -1]):
            test = Node(current.p, d)
            if last_direction != current.d and (node_cost.get(test, 0) - node_cost[current]) == 1000:
                trace.update(equal_cost_backtrace(parent, node_cost, parent.get(test)))
        last_direction = current.d
    return trace
 # simple A star
 def a_star() -> tuple[int, int]:
    t_start = Node(start, 0)
    pending: set[Node] = {t_start}
    parent: dict[Node, Node] = {}
    node_cost: dict[Node, float] = {t_start: 0.0}
    total_cost: dict[Node, float] = {t_start: cost_heuristic(t_start.p)}
    while len(pending):
        current = min(pending, key=lambda t: total_cost[t])
        if current.p == end:
            return int(node_cost[current]), len(equal_cost_backtrace(parent, node_cost, current))
        pending.remove(current)
        # scan in all directions
        for i, vector in enumerate([(0, 1), (1, 0), (0, -1), (-1, 0)]):
            neighbor = Node(Point(current.p.y + vector[0], current.p.x + vector[1]), i)
            if board[neighbor.p.y][neighbor.p.x] == '#':
                continue
            # assign new cost based on rotation and step
            new_cost = node_cost[current] + [0, 1000, 2000, 1000][(i - current.d) & 3] + 1
            if new_cost >= node_cost.get(neighbor, 1e13):
                continue
            parent[neighbor] = current
            node_cost[neighbor] = new_cost
            total_cost[neighbor] = new_cost + cost_heuristic(neighbor.p)
            if neighbor in pending:
                continue
            pending.add(neighbor)
    return 0, 0
 lowest_cost, nodes = a_star()
 print("Part 1:", lowest_cost)
 print("Part 2:", nodes)
Author	SHA1	Message	Date
Maya Herrscher	ef764ef2be	Day 25	2024-12-25 06:28:06 +01:00
Maya Herrscher	2b2261905f	Day 21 part 2 and challenge texts	2024-12-24 23:19:12 +01:00
Maya Herrscher	0b6a222015	Solution for day 24, trial and error	2024-12-24 17:09:01 +01:00
Maya Herrscher	5757e5fb19	Inefficient but correct solution for day 22/2	2024-12-23 19:22:56 +01:00
Maya Herrscher	9a0e5314e3	Day 23	2024-12-23 09:57:03 +01:00
Maya Herrscher	fcf7546442	Day 22 Part 1	2024-12-23 09:23:59 +01:00
Maya Herrscher	e478cf9030	Day 21 Part 1	2024-12-22 09:30:07 +01:00
Maya Herrscher	4bd6014a6e	Day 20, not the prettiest or fastest, but works	2024-12-20 13:57:19 +01:00
Maya Herrscher	3aa0c74003	Day 19 and gitignore	2024-12-19 06:30:40 +01:00
Maya Herrscher	3298e5cc8a	Day 16 Part 2 works now!	2024-12-18 09:50:26 +01:00
Maya Herrscher	e88cfd643a	Solution for day 18	2024-12-18 08:54:18 +01:00
Maya Herrscher	638d856417	Solution for Day 17, part 2 input specific	2024-12-17 12:57:54 +01:00
Maya Herrscher	6069495db4	Part 1 for day 16	2024-12-17 08:38:18 +01:00
Maya Herrscher	9d6ae2527b	Day 15 (Part 2 with lots of help)	2024-12-16 10:11:24 +01:00
Maya Herrscher	b64d593a51	Day 14. Part 2 was unsatisfying	2024-12-14 08:47:41 +01:00
Maya Herrscher	73c816e5a7	Day 13	2024-12-13 08:22:16 +01:00
Maya Herrscher	201077b551	Kind of ugly solution for Day 12	2024-12-12 15:41:59 +01:00
Maya Herrscher	4ae9fde7e9	Surprisingly efficient solution for Day 11	2024-12-11 09:45:57 +01:00
Maya Herrscher	dc4447ccfb	Day 10	2024-12-10 08:23:37 +01:00
Maya Herrscher	369e4c1e63	Kind of inefficient solution for day 9 (pt 2)	2024-12-09 09:13:32 +01:00
Maya Herrscher	90756ec10c	Day 8	2024-12-09 07:12:16 +01:00
Maya Herrscher	cac6ced738	Day 7	2024-12-07 10:51:01 +01:00
Maya Herrscher	6d87bf0038	Day 6	2024-12-06 09:25:19 +01:00
Maya Herrscher	731ce4b177	Day 5	2024-12-06 07:40:19 +01:00
Maya Herrscher	e48758bd3a	Day 4	2024-12-04 08:46:39 +01:00
Maya Herrscher	b3306371b3	Solution for day 3	2024-12-03 06:41:48 +01:00
Maya Herrscher	4790d7bc53	Add 2024 AoC, solution for day 1 and 2	2024-12-02 09:31:20 +01:00
Maya Herrscher	4a5a3ba757	Day 16 (not super efficient)	2023-12-16 10:50:00 +01:00
Maya Herrscher	312113ce81	Bene do stuff	2023-12-15 23:06:55 +01:00
Maya Herrscher	5f260fcfe2	Day 15	2023-12-15 09:10:47 +01:00
		`@@ -0,0 +1 @@`
							`rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7`
		`@@ -0,0 +1 @@`
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		`@@ -0,0 +1 @@`
							`xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))`
		`@@ -0,0 +1 @@`
							`xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))`
		`@@ -0,0 +1 @@`
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