About r/adventofcode
Advent of Code
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.
🎄 Advent of Code 🎄
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.
Rules + More Info in
our community wiki
| BEFORE YOU POST |
|---|
| If your post is even tangentially related to a daily puzzle, use our |
| STANDARDIZED POST TITLE FORMAT |
Solution Megathreads
December 2025
| Su | M | T | W | R | F | Sa |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 |
Previous years:
2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015
Quick Search by Flair
Because you're lazy and we like making things easy for you. Except AoC.
- Help/Question
- Help/Question - RESOLVED
- Visualization
- Tutorial
- Repo
- Past Event Solutions
- Streaming
- Meme/Funny
- Other
- Upping the Ante
- Solution Megathread
Are you enjoying AoC?
Code should be fun, because otherwise it's just a job. If you'd like to support Advent of Code, please share it with all your friends, even the ones that are just learning to code! AoC is a fun, non-threatening way to work at your own pace to figure out how to apply problem-solving first, then work within a language's constraints.
If you really want to show your appreciation, donations are always appreciated. Any instances of currency will go to, in no particular order:
- Server maintenance (hosting, bandwidth, etc.)
- Bribes to Santa
- Beer and sushi
- Paper bags for /u/topaz2078 to breathe into so he doesn't hyperventilate onto another plane of (non-)existence
Support AoC
Thank you very much, and enjoy your month of code!