add remaining code and input files from 2020

AoC2020/code/AoC13.py

@@ -0,0 +1,54 @@
+from numpy import prod
+
+
+def find_earliest_bus(start, buses):
+    i = start
+    next = 0
+    for time in buses:
+        if time == 'x':
+            pass
+        elif int(time) - start % int(time) < i:
+            i = int(time) - (start % int(time))
+            next = int(time)
+    return next * i
+
+
+def time_to_bus(start, bus):
+    i = -start % bus
+    return i
+
+
+def find_earliest_timestamp(timestamps):
+    dict = {}
+    for i in range(0, len(timestamps)):
+        if timestamps[i] == 'x':
+            pass
+        else:
+            line = int(timestamps[i])
+            dict[line] = i
+
+    t = 0
+    kgV = 1
+    for bus, wait in dict.items():
+        while not time_to_bus(t, bus) == (wait % bus):
+            t += kgV
+        kgV = kgV * bus
+    return t
+
+    #for n in range(1352008337, 1000000000000000000):
+    #    ar = [(n + dict[b]) % b == 0 for b in dict.keys()]
+    #    if False not in ar:
+    #        return n
+    #    print(n)
+
+
+with open(r"C:\Users\Maya\Desktop\Uni\WS_2021\AoC\input13") as f:
+    lines = f.readlines()
+    lines[0] = int(lines[0])
+    lines[1] = lines[1].split(",")
+
+    print(find_earliest_bus(lines[0], lines[1]))
+
+    print(find_earliest_timestamp(lines[1]))
+
+