My solutions to the wonderful http://adventofcode.com/ .
If you're looking for beautiful code, this probably isn't the place to look, but at least it all worked for me. After completing puzzles I looked around at other solutions, and, if you want to see some really elegant solutions, I can recommend https://github.com/ahorner/advent-of-code
Many thanks to Eric Wastl for the most excellent Advent of Code.