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Earned on 26 Jan 2012 for solving Problem 1. Times 2 - START HERE.
Earned on 11 Jul 2012 for liking Problem 738. Criss_Cross_010 : Unique elements, Square array....
Earned on 26 Jan 2012 for commenting on Solution 4528.
Earned on 6 Sep 2012 for creating Problem 933. Ordinal numbers.
Earned on 17 Feb 2012 for first solving Problem 323. Mechanics 1.
Earned on 26 Sep 2014 for solving all the problems in CUP Challenge.
Earned on 15 Feb 2012 for submitting the best solution Solution 41968.
Earned on 12 Oct 2015 for having 50 or more solvers for Problem 1323. Alternating sum.
Earned on 20 Feb 2013 for solving all the problems in Tiles Challenge.
Earned on 10 May 2013 for solving all the problems in ASEE Challenge.
Earned on 14 Mar 2013 for solving all the problems in Cody Challenge.
Earned on 22 Aug 2013 for creating 10 problems.
Earned on 19 Mar 2013 for solving 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.
Earned on 20 Jan 2013 for receiving 50 total likes for solutions.
Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.
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