Last year Eric Wastl published a set of programming challenges as Advent of Code. I recently went through them, and just made my Python solutions available via GitLab. Feel free to have a look, but please refrain from contacting me with questions about it.
On a related note, Advent of Code 2016 seems to be happening.
I love coding challenge sites! Thanks for introducing me to yet another. Are you on codewars?
No, I am not.