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aoc2021/03/solution_2.py

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2021-12-03 16:34:14 +01:00
#!/usr/bin/env python3
from collections import Counter
def flt(data, most):
positions = len(data[0])
for i in range(positions):
cnt = Counter(list(zip(*data[::-1]))[i]).most_common(2)
if len(cnt) > 1:
if cnt[0][1] == cnt[1][1]:
cond = '1' if most else '0'
else:
cond = cnt[0 if most else 1][0]
data = [x for x in data if x[i] == cond]
if len(data) == 1:
break
return data[0]
with open("input.txt", "r") as _input:
data = [l.rstrip() for l in _input.readlines()]
print("Answer:", int(flt(data, True), 2) * int(flt(data, False), 2))