Hey 👋
I’ve just published Part 2 of my Advent of Code 2025 write-up, covering days 7–12.
This part was significantly harder than the first one — I worked through graph traversal, memoization, bitmasking with BigInt, and even a full backtracking placement algorithm. Some days I solved completely, others I’ll definitely revisit later.
If you enjoy reading about how solutions evolve (not just final answers), you might find this useful.
👉 Read the post here:
https://chornonoh-vova.com/blog/advent-of-code-2025-days-7-12