Advent of Code 2025 solutions written in C++. For each day there is one "a" and one "b" file, which correspond to part 1 and 2 respectively. Since the solution for 10b uses GLPK for solving integer ...

Advent of Code starts on December 1 with tricky programming challenges. The virtual Advent calendar is opening its doors for the tenth time this year. Each day offers a two-part puzzle, with the ...

For the 2025 Advent of Code I decided to solve the puzzles in Forth. I learnt Forth back in 1983 or so to program 8 bit computers (my ZX81 with an alternate ROM) and used it for a few years, so I ...