Be the first to solve a problem
Awarded to kwijibo28 on 17 Feb 2014
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Create a problem
Solve all the problems in CUP Challenge
Awarded to kwijibo28 on 08 Feb 2014
Comment on a problem or solution
Awarded to kwijibo28 on 31 Jan 2014
Like a problem or solution
Awarded to kwijibo28 on 27 Jan 2014
Solve a problem for the first time
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