Alan

Solve a problem for the first time

Awarded to Alan on 20 Oct 2018

Solve a problem with a best solution

Awarded to Alan on 24 Oct 2018

Solve all the problems in CUP Challenge

Awarded to Alan on 25 Oct 2018

Comment on a problem or solution

Awarded to Alan on 11 Nov 2018

Solve all the problems in Cody Problems in Japanese problem group

Awarded to Alan on 19 Nov 2018

Be the first to solve a problem

Awarded to Alan on 14 Feb 2019