23 lines
810 B
Python
23 lines
810 B
Python
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#!/usr/bin/env python
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import re
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from collections import Counter
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r = re.compile(r'(\d+)-(\d+) (.): (.*)')
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def requirements_met_1(min_required, max_required, letter, password):
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return min_required <= Counter(password)[letter] <= max_required
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def requirements_met_2(first_pos, second_pos, letter, password):
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return (password[first_pos-1] == letter) != (password[second_pos-1] == letter)
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def do_line(req_func, line):
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min_required, max_required, letter, password = r.match(line).groups()
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return req_func(int(min_required), int(max_required), letter, password)
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if __name__ == '__main__':
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with open('input.txt', 'r') as f:
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lines = list(f.readlines())
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for func in (requirements_met_1, requirements_met_2):
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print(len(list(filter(lambda line: do_line(func, line), lines))))
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