Accept 1 answer given by other contributors
Awarded to J-G van der Toorn on 20 Jul 2017
Provide your first answer ever to someone else's question
Awarded to J-G van der Toorn on 20 Jul 2017
Receive 10 likes on a problem you have created
Awarded to J-G van der Toorn on 30 Jun 2021
Receive 25 likes on a problem you have created
Awarded to J-G van der Toorn on 20 Sep 2020
Publish your first review
Awarded to J-G van der Toorn on 09 Oct 2019
Publish your first submission
Awarded to J-G van der Toorn on 09 Oct 2019
Solve all the problems in Cody Problems in Japanese problem group
Awarded to J-G van der Toorn on 28 Feb 2018
Solve 500 problems
Awarded to J-G van der Toorn on 28 Feb 2018
Solve all the problems in Matrix Manipulation I
Awarded to J-G van der Toorn on 23 Feb 2018
Solve all the problems in CUP Challenge
Awarded to J-G van der Toorn on 24 Feb 2014
Create 10 problems
Awarded to J-G van der Toorn on 25 Oct 2013
Obtain 50 solvers for a problem you have created
Awarded to J-G van der Toorn on 01 Jul 2013
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