Advent of Code 2022 - Dia 06

advent-of-code-2022-dia-06.py

window = 14
for line in open(0):
    chars = [-1 for _ in range(256)]
    equal = -1
    for i, c in enumerate(ord(c) for c in line):
        if chars[c] > equal:
            equal = chars[c]
        else:
            if i - equal == window:
                print(i + 1)
                break
        chars[c] = i