Advent of Code 2025 in Zig.

As always, I try to come up with my own solutions, so they are probably not the most optimal.

Day-specific notes:

• Day 10 part B is awful, I just ended up deferring every machine to an ILP solver. GLPK with its glpsol program is required.
• Day 12 was also pretty bad. Implementing a proper solver that would finish running in reasonable time was beyond my pay grade. I decide to first get an upper bound on which trees are even viable, and turns out that was the correct answer to the real puzzle; even if that doesn't work on the test input.