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100644 index 0000000..e3b6ef0 --- /dev/null +++ b/2021/Python/day02.py @@ -0,0 +1,43 @@ +from functools import reduce +import re +from typing import Tuple + + +pattern = re.compile('^([a-z]+) ([0-9]+)$') + + +def load_input() -> list[Tuple[str, int]]: + with open('../.input/day02', 'r') as f: + return [ + (match.group(1), int(match.group(2))) for match + in (pattern.search(line.strip()) for line in f.readlines()) + ] + + +def solve1() -> int: + numbers = load_input() + instructions = { + "forward": lambda arg, x, y: (x + arg, y), + "up": lambda arg, x, y: (x, y + arg), + "down": lambda arg, x, y: (x, y - arg), + } + + x, y = reduce(lambda pos, item: instructions[item[0]](item[1], *pos), numbers, (0, 0)) + return abs(x) * abs(y) + + +def solve2() -> int: + numbers = load_input() + instructions = { + "forward": lambda arg, x, y, a: (x + arg, y + a * arg, a), + "up": lambda arg, x, y, a: (x, y, a - arg), + "down": lambda arg, x, y, a: (x, y, a + arg), + } + + x, y, _ = reduce(lambda pos, item: instructions[item[0]](item[1], *pos), numbers, (0, 0, 0)) + return abs(x) * abs(y) + + +if __name__ == '__main__': + print(solve1()) + print(solve2())