47 lines
1.3 KiB
Python
47 lines
1.3 KiB
Python
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import re
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from collections import Counter
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from solutions import BaseSolution
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class Solution(BaseSolution):
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input_file = "02.txt"
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def __str__(self):
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return "Day 2: Password Philosophy"
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def parse_input(self, data):
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def extract_data(subject):
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r1, r2, char, password = re.findall(
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r"^(\d+)-(\d+) (\w): (\w+)$", subject.strip()
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)[0]
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return (int(r1), int(r2), char, password)
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return [*map(extract_data, data.strip().splitlines())]
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def solve(self, puzzle_input):
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return sum(map(self.valid_sled_rental_password, puzzle_input))
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def solve_again(self, puzzle_input):
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return sum(map(self.valid_tc_password, puzzle_input))
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def valid_sled_rental_password(self, policy):
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range_start, range_stop, testchar, password = policy
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if not testchar in password:
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return False
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occourences = Counter(password)[testchar]
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return occourences >= range_start and occourences <= range_stop
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def valid_tc_password(self, policy):
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pos1, pos2, testchar, password = policy
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pos1 -= 1
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pos2 -= 1
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if not testchar in password:
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return False
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return sum(password[pos] == testchar for pos in (pos1, pos2)) == 1
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if __name__ == "__main__":
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solution = Solution()
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solution.show_results()
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