safe hatch
New puzzle at: <t:1701406801:t> your time
Advent of Code https://adventofcode.com/ is an 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. People use them as interview prep, company training, university coursework, practice problems, a speed contest, or to challenge each other.
You don't need a computer science background to participate - just a little programming knowledge and some problem solving skills will get you pretty far. Nor do you need a fancy computer; every problem has a solution that completes in at most 15 seconds on ten-year-old hardware.
https://adventofcode.com/2025/about
- The people of reddit doing "hard mode" and upping the ante: https://www.reddit.com/r/adventofcode/?f=flair_name%3A"Upping the Ante"
- Join the unofficial discord.js leader board:
419899-aad4c088at https://adventofcode.com/2025/leaderboard/private - Order by completion: https://adventofcode.com/2025/leaderboard/private/view/419899?order=stars
PLEASE SPOILER HINTS AND CODE SAMPLES RESPONSIBLY