AoC2020/03-2-1.py

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2020-12-04 11:37:31 +00:00
d=list(open(0))
2020-12-03 21:59:07 +00:00
def f(y,x=1):return sum(d[i][i*y//x%31]=='#' for i in range(0,323,x))
print(f(1)*f(3)*f(5)*f(7)*f(1,2))