Advent of code 2025

Advent of Code is an Advent calendar of small programming puzzles for a variety of 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.

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The purpose of this site is to showcase my Advent of Code 2025 project. The entire site is static and built without JavaScript, using only client-side Python thanks to PyScript. This framework allows Python code to be executed in the browser via WebAssembly (WASM) , offering an alternative to JavaScript. Each puzzle is therefore solved and displayed using Python executed locally in your browser.

An anti-spoiler tagging system allows you to navigate without the risk of inadvertently discovering solutions.

Feel free to explore the different solutions on offer.

Once the Advent of Code event is over (at which point I will have more time), I will work on optimising the website and providing explanations for each of the proposed solutions.

Exercice 1

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Exercice 2

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Exercice 1

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Exercice 1

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Exercice 2

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Exercice 1

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Exercice 2

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Exercice 1

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Exercice 2

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Exercice 2

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Exercice 1

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Exercice 2

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Exercice 2

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Exercice 2

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/!\ The solutions for day 10 do not run with pyscript in the browser because the library used, z3 (a satisfiability modulo theories (SMT) solver developed), is written in C++ and does not run with pyscript. I ran the Python scripts on my machine. The solutions are still correct, and you can run them on your computer.