Advent of Code

We collect solutions to the Advent of Code here.

Last Years

• 2020 Advent of Code
• 2021 Advent of Code
• 2022 Advent of Code
• 2023 Advent of Code
• 2024 Advent of Code

Private Leaderboard 2025

Only visible to members of the private leaderboard.

⌚ By Score 🌟 By Stars

Solutions for the Advent of Code 2025

Day 12 🎄

1. python - The correct answer sometimes lies in the middle by bismut
2. Rust - Okay ... aha ... AHHHHHHHH .. oh ... WTF .. -.- by Gronner

Day 11 🌐

1. python - I don't care which paths you take by bismut
2. Rust - Even faster with a little help by Gronner

Day 10 🐩

1. python - deepcopy and round to the rescue by bismut
2. Rust - Now we solve algos! by Gronner

Day 9 🎭

1. python - too many for loops by bismut
2. Rust - There is only so much light one can cast by Gronner

Day 8 🔌

1. python by bismut
2. Rust - Safety Moment: Don't chain-connect to many lights by Gronner

Day 7 ☄️

1. Rust - Close Up, this looks like the dark side of the moon by Gronner
2. python by bismut

Day 6 🧮

1. python by bismut
2. Rust - Don't make me write parsers so early by Gronner

Day 5 🫑

1. python - sets could have been nice without OOM Killer by bismut
2. Rust - There is a range of things to do by Gronner

Day 4 🧻

1. Rust - They had me in the first half by Gronner
2. python by bismut

Day 3 🔋

1. python by bismut
2. Rust - e-AoC by Gronner

Day 2 🏷️

1. Rust - Why think a little, when computer can think a lot! by Gronner
2. python by bismut

Day 1 ⏲️

1. Rust - Round and round we go by Gronner
2. python by bismut