66 lines
1.5 KiB
Python
66 lines
1.5 KiB
Python
from tools.aoc import AOCDay
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from typing import Any, List
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PAIRS = {
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"<": ">",
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"(": ")",
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"{": "}",
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"[": "]"
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}
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def parse_line(line: str) -> (bool, List[str], str): # (corrupt, expected_closings, last_char)
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expect_close = []
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for c in line:
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if c in PAIRS:
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expect_close.insert(0, PAIRS[c])
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else:
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if c != expect_close.pop(0):
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return True, expect_close, c
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return False, expect_close, ""
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class Day(AOCDay):
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inputs = [
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[
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(26397, "test_input10"),
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(168417, "input10")
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],
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[
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(288957, "test_input10"),
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(2802519786, "input10")
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]
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]
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def part1(self) -> Any:
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char_scores = {")": 3, "]": 57, "}": 1197, ">": 25137}
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total_score = 0
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for line in self.getInput():
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corrupt, _, c = parse_line(line)
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if corrupt:
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total_score += char_scores[c]
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return total_score
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def part2(self) -> Any:
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scores = []
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for line in self.getInput():
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corrupt, expect_close, _ = parse_line(line)
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if not corrupt and len(expect_close) > 0:
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line_score = 0
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for c in expect_close:
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line_score *= 5
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line_score += [")", "]", "}", ">"].index(c) + 1
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scores.append(line_score)
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return list(sorted(scores))[len(scores) // 2]
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if __name__ == '__main__':
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day = Day(2021, 10)
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day.run(verbose=True)
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