import re

result = 0
with open("part2_input.txt", "r") as file_input:
    raw_key_values = re.findall(r"(mul\(\d+,\d*\))|(do\(\))|(don't\(\))", file_input.read())
    key_values = []
    for match_tuple in raw_key_values:
        temp_list = list(match_tuple)
        temp_filtered_list = list(filter(None, temp_list))
        key_values.append(temp_filtered_list[0])
    skip = False
    math_list = []
    for item in key_values:
        if item == "don't()":
            skip = True
            continue
        elif item == "do()":
            skip = False
            continue
        elif skip:
            continue
        math_list.append(item)

    for item in math_list:
        first_number, second_number = re.findall(r"\d+", item)
        result += int(first_number) * int(second_number)

print(result)