Derik Zhou

Like a problem or solution

Awarded to Derik Zhou on 15 Apr 2015

Comment on a problem or solution

Awarded to Derik Zhou on 15 Apr 2015

Solve a problem for the first time

Awarded to Derik Zhou on 29 Jan 2015

Be the first to solve a problem

Awarded to Derik Zhou on 15 Apr 2015

Create a problem

Awarded to Derik Zhou on 15 Apr 2015

Obtain 50 solvers for a problem you have created

Awarded to Derik Zhou on 14 Dec 2020