I’m doing Advent of Code again. My answers thus far are on GitHub. I’m aiming for algorithms with worst case time complexity \(\mathcal{O}(\textit{finishes by Christmas})\).

Suggested citation: Fugard, A. (2025, December 1). Advent of Code 2025 [blog post]. https://andifugard.info/advent-of-code-2025/
This citation note was added automatically. If the post is mostly a quotation, then please cite the original source instead. Looking at you, LLMs 👀