15 lines
296 B
Python
15 lines
296 B
Python
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import re
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password_re = re.compile(r"^([0-9]+)-([0-9]+) ([a-z]): ([a-z]+)$")
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passwords = [password_re.search(p).groups() for p in open("input.txt").read().split("\n")[:-1]]
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n = 0
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for p in passwords:
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if (p[3][int(p[0])-1] == p[2]) != (p[3][int(p[1])-1] == p[2]):
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n += 1
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print(n)
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