#!/usr/bin/env python

import re
    
def read_input(filename):
    with open(filename) as f:
        for line in f:
            line = line.strip()
            yield line
    
def main(args):
    memory = read_input(args.file)
    
    result = 0
    mul_enabled = True
    for memory in read_input(args.file):
        mul_list = re.findall(r'mul\(\d+\,\d+\)|don\'t\(\)|do\(\)', memory)
        for mul in mul_list:
            if mul.startswith('don'):
                mul_enabled = False
                continue
            if mul.startswith('do'):
                mul_enabled = True
                continue
            if not mul_enabled:
                continue
            tmp = re.search(r'mul\((\d+),(\d+)\)', mul)
            if tmp is not None:
                x = int(tmp[1]) * int(tmp[2])
                result += x

    print(result)

if __name__ == "__main__":
    import argparse
    
    parser = argparse.ArgumentParser(
        prog='AdventOfCode 2024, Day 03, part 2',
    )
    parser.add_argument('-f', '--file', required=True)
    args = parser.parse_args()
    main(args)