18 lines
426 B
Python
18 lines
426 B
Python
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#!/usr/bin/env python3
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import re
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pattern = re.compile('(\d+)-(\d+)\s(\w):\s(\w+)')
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with open('input', 'r') as f:
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content = list(map(str.strip, f.readlines()))
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valid_pws = 0
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for entry in content:
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p1, p2, char, pw = re.match(pattern, entry).groups(1)
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p1 = int(p1) - 1
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p2 = int(p2) - 1
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if pw[p1] == char and pw[p2] != char or pw[p1] != char and pw[p2] == char:
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valid_pws += 1
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print(valid_pws)
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