Advent Of Code

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An unofficial home for the advent of code community on programming.dev! Other challenges are also welcome!

Advent of Code is an annual Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.

Everybody Codes is another collection of programming puzzles with seasonal events.

EC 2025

AoC 2024

Solution Threads

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console.log('Hello World')

founded 2 years ago

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🍷 - 2024 DAY 3 SOLUTIONS -🍷 (programming.dev)

submitted 11 months ago* (last edited 11 months ago) by CameronDev@programming.dev to c/advent_of_code@programming.dev

49 comments fedilink hide all child comments

Day 3: Mull It Over

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[–] janAkali@lemmy.one 5 points 11 months ago* (last edited 11 months ago) (1 children)

Nim

From a first glance it was obviously a regex problem.
I'm using tinyre here instead of stdlib re library just because I'm more familiar with it.

import pkg/tinyre

proc solve(input: string): AOCSolution[int, int] =
  var allow = true
  for match in input.match(reG"mul\(\d+,\d+\)|do\(\)|don't\(\)"):
    if match == "do()": allow = true
    elif match == "don't()": allow = false
    else:
      let pair = match[4..^2].split(',')
      let mult = pair[0].parseInt * pair[1].parseInt
      result.part1 += mult
      if allow: result.part2 += mult

Codeberg repo

[–] sjmulder@lemmy.sdf.org 4 points 11 months ago

I shy away from regexes for these parsing problems because part 2 likes to mess those up but here it worked beautifully. Nice and compact solution!