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aoc-2020/13/part2.py

16 lines
321 B
Python

def getBuses(filename):
with open(filename, "r") as f:
f.readline()
return {i:int(x) for i, x in enumerate(f.readline().split(",")) if x != "x"}
buses = getBuses("input.txt")
step = list(buses.values())[0]
t = step
for dt, busId in buses.items():
while (t + dt) % busId != 0:
t += step
step *= busId
print(t)