Like a problem or solution
Awarded to Elena De Angelis on 20 Oct 2017
Solve all the problems in CUP Challenge
Awarded to Elena De Angelis on 20 Oct 2017
Solve a problem for the first time
Awarded to Elena De Angelis on 21 Sep 2017
Provide your first answer ever to someone else's question
Awarded to Elena De Angelis on 20 Jul 2017
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