10 of your answers have been accepted
Awarded to Niels on 15 Feb 2022
Contribute at least one answer each month for 3 consecutive months
Awarded to Niels on 20 Jul 2017
3 of your answers have been accepted
Awarded to Niels on 20 Jul 2017
Provide your first answer ever to someone else's question
Awarded to Niels on 20 Jul 2017
Solve all the problems in CUP Challenge
Awarded to Niels on 24 Apr 2015
Like a problem or solution
Awarded to Niels on 25 Jun 2014
Solve a problem with a best solution
Awarded to Niels on 17 Jun 2014
Comment on a problem or solution
Awarded to Niels on 05 May 2014
Solve a problem for the first time
Awarded to Niels on 08 Apr 2014
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