J-G van der Toorn

Provide your first answer ever to someone else's question

Awarded to J-G van der Toorn on 20 Jul 2017

Accept 1 answer given by other contributors

Awarded to J-G van der Toorn on 20 Jul 2017

Obtain 50 solvers for a problem you have created

Awarded to J-G van der Toorn on 01 Jul 2013

Solve all the problems in CUP Challenge

Awarded to J-G van der Toorn on 24 Feb 2014

Solve all the problems in Cody Problems in Japanese problem group

Awarded to J-G van der Toorn on 28 Feb 2018

Like a problem or solution

Awarded to J-G van der Toorn on 26 Nov 2012

Comment on a problem or solution

Awarded to J-G van der Toorn on 11 Sep 2012

Solve a problem for the first time

Awarded to J-G van der Toorn on 11 Sep 2012

Solve 500 problems

Awarded to J-G van der Toorn on 28 Feb 2018

Solve a problem with a best solution

Awarded to J-G van der Toorn on 11 Oct 2012

Be the first to solve a problem

Awarded to J-G van der Toorn on 11 Oct 2012

Create a problem

Awarded to J-G van der Toorn on 13 Sep 2012

Create 10 problems

Awarded to J-G van der Toorn on 25 Oct 2013

Solve all the problems in Matrix Manipulation I

Awarded to J-G van der Toorn on 23 Feb 2018

Receive 25 likes on a problem you have created

Awarded to J-G van der Toorn on 20 Sep 2020

Receive 10 likes on a problem you have created

Awarded to J-G van der Toorn on 30 Jun 2021

Publish your first submission

Awarded to J-G van der Toorn on 09 Oct 2019

Publish your first review

Awarded to J-G van der Toorn on 09 Oct 2019