Advent Of Code

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An unofficial home for the advent of code community on programming.dev!

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.

AoC 2024

Solution Threads

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🌲 - 2024 DAY 1 SOLUTIONS -🌲 (programming.dev)

submitted 3 weeks ago by Ategon@programming.dev to c/advent_of_code@programming.dev

39 comments fedilink hide all child comments

Day 1: Historian Hysteria

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[–] sjmulder@lemmy.sdf.org 3 points 3 weeks ago (1 children)

Solution in C

Part 1 is a sort and a quick loop. Part 2 could be efficient with a lookup table but it was practically instant with a simple non-memoized scan so left it that way.

[–] mcmodknower@programming.dev 1 points 3 weeks ago* (last edited 3 weeks ago) (1 children)

You are using some interesting techniques there. I never imaged you could use the result of == for adding to a counter.

But how did you handle duplicates in part 2?

[–] sjmulder@lemmy.sdf.org 1 points 3 weeks ago

I’m not sure if I understand the question correctly but for every number in the left array I count in the right array. That means duplicate work but shrug 😅