Earned on 10 Mar 2012 for solving Problem 1. Times 2 - START HERE.
Earned on 14 Jul 2012 for liking Problem 226. What are the odds?.
Earned on 12 Nov 2013 for commenting on Solution 348033.
Earned on 28 Jul 2012 for creating Problem 868. Replace all zeros and NaNs in a matrix with the....
Earned on 10 Oct 2014 for first solving Problem 1973. Reassign cell contents to empty variables, pre....
Earned on 11 Mar 2015 for solving all the problems in CUP Challenge.
Solve a problem with a best solution.
Earned on 28 Feb 2016 for having 50 or more solvers for Problem 876. Sum the entries of each column of a matrix whic....
Solve all the problems in Tiles Challenge problem group.
Solve all the problems in ASEE Challenge problem group.
Earned on 6 Nov 2013 for solving all the problems in Cody Challenge.
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.
Must receive 25 total likes for the problems you created.
Must receive 50 total likes for the solutions you submitted.
Solve all the problems in Indexing I problem group.
Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.
Solve all the problems in Indexing II problem group.
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