Advent of Code
Advent of Code is a series of small programming puzzles for a variety of skill levels. They are self-contained and are just as appropriate for an expert who wants to stay sharp as they are for a beginner who is just learning to code. Each puzzle calls upon different skills and has two parts that build on a theme.
Tue 01 Dec 2015 03:06:46 PM UTC - permalink -
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http://adventofcode.com/