adding day15 part 1 sol

cheeky solution for day14 part two

finished day13, forgot cramers rule

there's no way I needed union find

adding day8 solutions

you idiot

finally coded day9 part two

adding day11 solutions

adding solutions for day10 and day1 part 1

adding day 7 solutions

adding day5 solutions

adding solutions for days 2, 3, 4

Initial commit