Publish your first submission
Awarded to Alexander on 09 Oct 2019
Obtain 50 solvers for a problem you have created
Awarded to Alexander on 20 Aug 2015
Be the first to solve a problem
Awarded to Alexander on 22 Oct 2014
Create a problem
Awarded to Alexander on 16 Nov 2013
Solve a problem for the first time
Awarded to Alexander on 05 Mar 2013
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