rename stuff

2020/code/AoC19.py

@@ -0,0 +1,60 @@
+import re
+
+
+def memo(f):
+    memo = {}
+
+    def f2(x):
+        if x not in memo:
+            memo[x] = f(x)
+        return memo[x]
+
+    return f2
+
+
+def parse(l):
+    srules = re.compile(r"(?P<rule>\d+): (?P<num1>\d+)\n").findall(l)
+    rules = re.compile(r"(?P<rule>\d+): (?P<num1>\d+) (?P<num2>\d+)\n").findall(l)
+    wrules = re.compile(r"(?P<rule>\d+): \"(?P<body>\w)\"\n").findall(l)
+    crules = re.compile(r"(?P<rule>\d+): (?P<num11>\d+) (?P<num12>\d+) \| (?P<num21>\d+) (?P<num22>\d+)\n").findall(l)
+    csrules = re.compile(r"(?P<rule>\d+): (?P<num11>\d+) \| (?P<num21>\d+)\n").findall(l)
+    messages = re.compile(r"(?P<message>\w+)\n").findall(l)
+    return rules, wrules, crules, srules, csrules, messages
+
+
+def check_if_valid(message):
+    return 0
+
+
+@memo
+def build_regex(rule):
+    if dict[rule] == 'a' or dict[rule] == 'b':
+        return dict[rule]
+    if type(dict[rule]) == int:
+        return build_regex(dict[rule])
+    s = "("
+    for i, r in enumerate(dict[rule]):
+        if i == 2:
+            s += ")|("
+        s += build_regex(r)
+    return s + ")"
+
+
+with open(r"C:\Users\Maya\Desktop\Uni\WS_2021\AoC\input19") as f:
+    lines = f.readlines()
+    lines = "".join(lines)
+    r, w, c, s, messages = parse(lines)
+    rules = r + w + c + s
+    dict = {}
+    for rule in rules:
+        if len(rule) == 2:
+            try: dict[int(rule[0])] = int(rule[1])
+            except ValueError: dict[int(rule[0])] = rule[1]
+        if len(rule) == 3:
+            dict[int(rule[0])] = int(rule[1]), int(rule[2])
+        if len(rule) == 5:
+            dict[int(rule[0])] = int(rule[1]), int(rule[2]), int(rule[3]), int(rule[4])
+
+    print(dict)
+    print(build_regex(0))
+    print(sum([check_if_valid(m) for m in messages]))