#!/usr/bin/env python
import re

from common import parse


def solve(input: str, debug=False) -> int:
    regex = r"(mul\((\d+),(\d+)\)|do\(\)|don't\(\))"
    prog = re.findall(regex, input)
    the_sum = 0
    enabled = True
    for stance in prog:
        if debug:
            print(stance[0], end=": ")
        if enabled and stance[0].startswith("mul"):
            if debug:
                print("multiplying")
            the_sum += int(stance[1]) * int(stance[2])
        elif enabled and stance[0] == "don't()":
            if debug:
                print("disabling")
            enabled = False
        elif not enabled and stance[0] == "do()":
            if debug:
                print("enabling")
            enabled = True
        else:
            if debug:
                print("noop")
    return the_sum


def main():
    print(solve(parse("input")))


if __name__ == "__main__":
    main()