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Earned on 16 May 2014 for first solving Problem 584. middleAsColumn: Return all but first and last ....
Earned on 23 Jul 2014 at 2:04 for having 50 or more solvers for Problem 589. Matrix indexing with two vectors of indices.
Earned on 28 Apr 2013 for creating 10 problems.
Solve 500 problems.
Must receive 25 total likes for the problems you created.
Must receive 10 likes for a solution you submitted.
Must receive 50 total likes for the solutions you submitted.
Must receive 10 likes for a problem you created.