Receive 25 likes on a problem you have created
Awarded to Marcel on 09 Aug 2021
Receive 10 likes on a problem you have created
Awarded to Marcel on 13 Dec 2020
Publish your first submission
Awarded to Marcel on 09 Oct 2019
Obtain 50 solvers for a problem you have created
Awarded to Marcel on 19 Oct 2016
Create 10 problems
Awarded to Marcel on 15 Jan 2014
Solve a problem with a best solution
Awarded to Marcel on 29 Dec 2013
Create a problem
Awarded to Marcel on 20 Dec 2013
Solve all the problems in Tiles Challenge
Awarded to Marcel on 20 Dec 2013
Like a problem or solution
Awarded to Marcel on 20 Dec 2013
Solve all the problems in ASEE Challenge
Awarded to Marcel on 17 Dec 2013
Solve all the problems in CUP Challenge
Awarded to Marcel on 07 Dec 2013
Comment on a problem or solution
Awarded to Marcel on 24 Nov 2013
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