70 lines
1.6 KiB
Python
70 lines
1.6 KiB
Python
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#!/usr/bin/env python3
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import fileinput
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from pprint import pprint
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from typing import List, Tuple, Any, Set, Generator
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from timeit import timeit
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lines = list(fileinput.input())
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def neighborhood(
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m: List[List[int]], x: int, y: int
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) -> Generator[Tuple[int, int], None, None]:
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h = ((-1, -1), (-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1), (1, 0), (1, 1))
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yield from (
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(x_ + x, y_ + y)
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for x_, y_ in h
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if 0 <= x_ + x < len(m[0]) and 0 <= y_ + y < len(m)
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)
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def step(field):
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for y in range(len(field)):
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for x in range(len(field[y])):
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field[y][x] += 1
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flash_queue = [
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(x, y)
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for y in range(len(field))
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for x in range(len(field[y]))
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if field[y][x] > 9
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]
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flashed = set()
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while flash_queue:
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x, y = flash_queue.pop()
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if (x, y) in flashed:
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continue
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flashed.add((x, y))
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for x_, y_ in neighborhood(field, x, y):
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field[y_][x_] += 1
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if field[y_][x_] > 9 and (x_, y_) not in flashed:
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flash_queue.append((x_, y_))
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for x, y in flashed:
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field[y][x] = 0
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return len(flashed)
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def main() -> Tuple[int, int]:
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field = [[int(c) for c in line.strip()] for line in lines]
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len_ = len(field) * len(field[0])
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part1 = 0
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part2 = 0
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for part2 in range(100):
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part1 += step(field)
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while step(field) != len_ and sum(sum(row) for row in field) != 0:
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part2 += 1
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return part1, part2 + 2
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if __name__ == "__main__":
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print(main())
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print(f"{timeit(main, number=100) * 10:.3f} ms")
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