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.

AoC 2025

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console.log('Hello World')

founded 3 years ago

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🎄 - 2025 DAY 5 SOLUTIONS - 🎄 (programming.dev)

submitted 11 months ago by CameronDev@programming.dev to c/advent_of_code@programming.dev

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Day 5: Cafeteria

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[–] Chais@sh.itjust.works 2 points 10 months ago* (last edited 10 months ago)

I haven't timed it, but easily below a second.
Could that be optimised? Most certainly.

Due to the ranges being in a set, rather than a list, the input order doesn't matter anyway. And the set really does a lot of heavy lifting for making the code so concise. You'll need a bunch of boilerplate for list maintenance, especially if you continuously keep it sorted.
The set also removed 8 duplicates I had in the input.

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