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Earned on 26 Jan 2012 for first solving .
Earned on 31 Mar 2012 for submitting the best solution .
Solve all the problems in CUP Challenge problem group.
Earned on 26 Jun 2014 for having 50 or more solvers for Problem 108. Given an unsigned integer x, find the largest y....
Solve all the problems in Cody Challenge problem group.
Solve all the problems in ASEE Challenge problem group.
Earned on 2 Feb 2012 for creating 10 problems.
Solve 500 problems.
Must receive 10 likes for a solution you submitted.
Earned on 25 Jul 2013 for receiving 25 total likes for the created problems.
Must receive 50 total likes for the solutions you submitted.
Must receive 10 likes for a problem you created.