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Earned on 13 Sep 2012 for creating Problem 944. Create incremental spiral WITHOUT USING EVAL or....
Earned on 6 Jan 2015 for first solving Problem 988. Convert a substructure reference string into a ....
Solve all the problems in Tiles Challenge problem group.
Solve all the problems in Cody Challenge problem group.
Solve all the problems in ASEE Challenge problem group.
Earned on 25 Oct 2013 for creating 10 problems.
Solve 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.
Solve all the problems in Magic Numbers problem group.
Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.