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Earned on 31 Jul 2012 for solving Problem 868. Replace all zeros and NaNs in a matrix with the....
Earned on 2 Aug 2012 for commenting on Problem 852. Index of neighbor pixel with steepest gradient.
Solve a problem first.
Create a problem.
Solve a problem with a best solution.
Must have 50 solvers for a problem you created.
Solve all the problems in Tiles Challenge problem group.
Solve all the problems in Cody Challenge problem group.
Solve all the problems in CUP Challenge problem group.
Solve all the problems in ASEE Challenge problem group.
Create 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.