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Earned on 4 Apr 2012 for solving Problem 470. Scoring for oriented dominoes.
Like a problem or solution.
Comment on a problem or solution.
Create a problem.
Solve a problem first.
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.
Earned on 14 Mar 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.
Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.
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