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Earned on 10 Jan 2013 for first solving Problem 1193. Insert zeros into vector.
Earned on 3 Oct 2015 for solving all the problems in CUP Challenge.
Solve a problem with a best solution.
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Earned on 12 Dec 2012 for solving all the problems in Tiles Challenge.
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Earned on 14 Mar 2013 for solving all the problems in Cody Challenge.
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Earned on 3 Oct 2015 for solving 500 problems.
Solve all the problems in Modeling and Simulation Challenge problem group.
Earned on 13 Oct 2015 for solving all the problems in Magic Numbers.
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