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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.
Earned on 31 Jul 2012 for liking Solution 60410.
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Earned on 4 Aug 2012 for first solving Problem 876. Sum the entries of each column of a matrix whic....
Solve all the problems in CUP Challenge problem group.
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 ASEE Challenge problem group.
Solve all the problems in Cody Challenge problem group.
Create 10 problems.
Solve 500 problems.
Solve all the problems in Modeling and Simulation Challenge problem group.
Solve all the problems in Magic Numbers problem group.
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Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.
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