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

Solution Threads

M	T	W	T	F	S	S
1	2	3	4	5	6	7
8	9	10	11	12

Visualisations Megathread

Rules/Guidelines

Follow the programming.dev instance rules
Keep all content related to advent of code in some way
If what youre posting relates to a day, put in brackets the year and then day number in front of the post title (e.g. [2024 Day 10])
When an event is running, keep solutions in the solution megathread to avoid the community getting spammed with posts

Relevant Communities

Relevant Links

Advent of Code Homepage

Credits

Icon base by Lorc under CC BY 3.0 with modifications to add a gradient

console.log('Hello World')

founded 2 years ago

MODERATORS

Ategon@programming.dev

Sigmatics@lemmy.ca

CameronDev@programming.dev

hades@programming.dev

How are there submissions that are under 90 seconds? (midwest.social)

submitted 1 year ago by The_Shwa@midwest.social to c/advent_of_code@programming.dev

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I was looking through the global leader board for day 3 today and noticed that the first 100 results are all under 90 seconds, with the top 4 being under 30 seconds. How is that possible? What are people leveraging in order to accomplish this?

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[–] Maddier1993@programming.dev 11 points 1 year ago* (last edited 1 year ago)

Professional code golfers (Is that the right term?) build up a large suite of helper libraries from past events/from daily puzzle solving that they invoke for common problem types like graph search or constraint solving, or even for converting the text input to the right data structures.

I assume the most difficult aspect of the problems is to translate the statements into actual code constraints/filter functions. So the spirit of the competition is not broken by having pre-written code (Although I am not sure many would think pre-written code is acceptable).