38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
# SPDX-License-Identifier: MIT
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# Copyright (c) 2020 Akumatic
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#
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# https://adventofcode.com/2020/day/4
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import re
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def readFile() -> list:
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result = list()
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with open(f"{__file__.rstrip('code.py')}input.txt", "r") as f:
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for data in f.read()[:-1].split("\n\n"):
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result.append(dict(d.split(":") for d in data.replace("\n", " ").split()))
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return result
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def assert_fields(data: dict) -> bool:
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return all((k in data for k in ("byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid")))
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def part1(vals: list) -> int:
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return len(vals)
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def part2(vals: list) -> int:
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patterns = {
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"byr": "19[2-9][0-9]|200[0-2]",
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"iyr": "20(1[0-9]|20)",
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"eyr": "20(2[0-9]|30)",
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"hgt": "1([5-8][0-9]|9[0-3])cm|(59|6[0-9]|7[0-6])in",
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"hcl": "#[0-9a-f]{6}",
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"ecl": "amb|blu|brn|gry|grn|hzl|oth",
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"pid": "[0-9]{9}",
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"cid": ".*"
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}
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return sum((all((re.fullmatch(patterns[v], val[v]) for v in val)) for val in vals))
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if __name__ == "__main__":
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vals = readFile()
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valid_passes = [val for val in vals if assert_fields(val)]
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print(f"Part 1: {part1(valid_passes)}")
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print(f"Part 2: {part2(valid_passes)}") |