Day 3: Mull It Over
Megathread guidelines
- Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever)
- You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ if you prefer sending it through a URL
FAQ
- What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
- Where do I participate?: https://adventofcode.com/
- Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465
Python
Part1:
matches = re.findall(r"(mul\((\d+),(\d+)\))", input) muls = [int(m[1]) * int(m[2]) for m in matches] print(sum(muls))Part2:
instructions = list(re.findall(r"(do\(\)|don't\(\)|(mul\((\d+),(\d+)\)))", input) mul_enabled = True muls = 0 for inst in instructions: if inst[0] == "don't()": mul_enabled = False elif inst[0] == "do()": mul_enabled = True elif mul_enabled: muls += int(inst[2]) * int(inst[3]) print(muls)