import re
from functools import reduce

test_input_p1 = (
    "xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))"
)
test_input_p2 = (
    "xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))"
)

test_solution_p1 = 161
test_solution_p2 = 48

instruction_pattern = re.compile(r"mul\((\d+),(\d+)\)|(do(?:n't)?)\(\)")


def solve_p1(puzzle_input: str) -> int:
    instructions = (
        tuple(map(int, match[:2]))
        for match in instruction_pattern.findall(puzzle_input)
        if match[0]
    )
    return sum(a * b for a, b in instructions)


def solve_p2(puzzle_input: str) -> int:
    instructions = (
        match[2] or tuple(map(int, match[:2]))
        for match in instruction_pattern.findall(puzzle_input)
    )
    return reduce(
        lambda a, i: (
            (1 if i == "do" else 0, a[1])
            if isinstance(i, str)
            else (a[0], a[1] + a[0] * i[0] * i[1])
        ),
        instructions,
        (1, 0),
    )[1]