AdventOfCode/2024/03/solution.py

#!/bin/python3
import sys,re
from pprint import pprint
sys.path.insert(0, '../../')
from fred import list2int,get_re,nprint,lprint

input_f = 'input'

part = 2
#########################################
#                                       #
#              Part 1                   #
#                                       #
#########################################
result = 0
if part == 1:
    with open(input_f) as file:
        for line in file:
            for i in re.findall(r"(mul\((\d+),{1}(\d+)\))",line.rstrip()):
                result += (int(i[1])*int(i[2]))

    print(result)



#########################################
#                                       #
#              Part 2                   #
#                                       #
#########################################
result = 0
do = True
if part == 2:
    with open(input_f) as file:
        for line in file:
            matches = re.findall(r"mul\(\d+,\d+\)|do\(\)|don't\(\)",line.rstrip())
            for match in matches:
                if match == 'do()':
                    do = True
                elif match == "don't()":
                    do = False
                else:
                    if do:
                        m = get_re(r"mul\((\d+),{1}(\d+)\)",match)
                        result += (int(m.group(1))*int(m.group(2)))
    print(result)
# Not really happy with my code. I would prefer to find all mul(x,y) between do() and don't(), 
# instead of finding all the mul/do/don't and then turning calculation on/off.