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Earned on 17 Dec 2012 for creating Problem 1124. String permutations on phone keyboard.
Earned on 2 May 2014 for first solving .
Earned on 11 Jul 2013 for submitting the best solution .
Must have 50 solvers for a problem you created.
Earned on 8 Dec 2013 for creating 10 problems.
Earned on 23 Apr 2013 for solving 500 problems.
Solve all the problems in Modeling and Simulation Challenge problem group.
Must receive 25 total likes for the problems you created.
Must receive 50 total likes for the solutions you submitted.
Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.