day10 solution

add missing testcase to day 9

awful day 9 solution bleh

minor day 8 tweak

flamegraph.svg snuck in there!

day 8 solution

day 7 optimizations

- no need to sort thanks to `select_nth_unstable()`
- don't copy the array around

small tweak (convers sum() to fold())

misc optimizations

cleanup main a bit

day 7 solution

minor cleanup

day 6 solution

shell for day6

cleanup some clippy warnings

day 5 solution

move to include_str!() macro for all data

Move away from I/O to just including the data in the program via macro.

day 4 logic simplification

day 3 and 4 solutions

day2 solution