Obtain 50 solvers for a problem you have created

Awarded to Noriko Hounoki on 04 Nov 2020

Be the first to solve a problem

Awarded to Noriko Hounoki on 06 Nov 2017

Create a problem

Awarded to Noriko Hounoki on 27 Jun 2017

Solve 500 problems

Awarded to Noriko Hounoki on 24 May 2017

Solve all the problems in CUP Challenge

Awarded to Noriko Hounoki on 29 Jan 2017

Comment on a problem or solution

Awarded to Noriko Hounoki on 07 Dec 2016

Like a problem or solution

Awarded to Noriko Hounoki on 07 Dec 2016

Solve a problem for the first time

Awarded to Noriko Hounoki on 16 Nov 2016