- https://adventofcode.com/2021/day/24
- https://adventofcode.com/2024/day/24
And maybe even:
- https://adventofcode.com/2023/day/25
- https://adventofcode.com/2024/day/14
The first two can be solved by creativity and exploration, they’re not just “use algorithm
$foo
” like many other puzzles. They require hardly any programming at all.The other two do need a bit of programming, but 2024/14 was pretty interesting and unconventional.