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