These are my solutions to Advent of Code puzzles.
They were done out of order in different languages (first JS, some attemps in C++, more JS, and finally Python). Some years were initially not completed, but during the summer of 2025 I solved all remaining puzzles for all years in Python.
There is no commit history before 2025 as I reorganized an old set of repositories.
It depends on the years (and days...)
Python solutions use aocd to fetch inputs and a common library in lib for python solutions. A pip install -e . is required to make that work, as well as an AOC_SESSION env variable with the session ID from the AoC website. Then just run each day separately (eg. cd 2015; python d21.py).
Some solutions expect to run in the browser on the AOC webpage while being logged in, as they use the fetch API to get inputs. Copy-paste them in the developer console. That was the way I solved AoC initially. Please analyze the code before executing it. It may steal your credentials (no, it will not, but you should not trust a random internet dev).
Later on, I decided to build a small frontend app to host them, with a nice UI and graphic visualizations for some puzzles. For those:
- Download your puzzle inputs and store them as
<year>/input/<day> - Use a local webserver like
python -m http.serveror npm's serve in the year directory - Direct your browser to
aoc.html
Note that for the latter, your browser may look like it's frozen for a while when running some solutions.
- Days 1-19 were done in JS in 2019 when I got stuck on solving that year's puzzles. They expect to run in the dev console on the AoC website. Day 19 is incomplete, but I still have the star. Probably ran some code from reddit.
- Days 20-25 were done in Python in 2025.
All done in 2025 in Python.
All done in 2025 in Python.
- Days 1-4 were done in C++ in 2020, after I finished that year's puzzles. Download inputs into
2018/input/<day>and usecd 2018; make; aoc-2018. You will need SDL2 headers. Press Q to quit when day 4 is done. I don't have a solution for part 2 in here, but somehow I have the star. Probably stole some reddit code. - Days 5-25 were done in Python in 2025
I loved Intcode so much. Made me want to do Synacor and Bound Variable later on.
- Most of days 1-24 were done in JS in 2019. They run in the dev console on the AoC website. I got stuck on several of them.
- All missing days were done in Python in 2025.
Done in JS in 2020. Runs as a webapp on a local webserver.
Done in JS in 2021. Runs as a webapp on a local webserver.
Done in JS in 2022, but skipped day 22 part 2. Runs as a webapp on a local webserver.
Done in JS in 2023. Runs as a webapp on a local webserver.
I didn't do it in december 2024 as real life took over.
I did them in 2025 in Python, as an exercise to get back into Python dev. Each day looks for the input with the same basename in 2024/data/dXX.in, I wasn't using aocd at first. It also does not use the same common lib tools used by other Python years, as I did that later.