Welcome to LightOJ

Solve Problems

Solve various algorithmic problems on LightOJ. All the problems are categorized. Kick start problem solving from the warm-up problems.

Host Contests and Participate

Participate in contests arranged by LightOJ and the community. And host contests without any fee(*) on LightOJ.

Become a Better Programmer

We will be introducing various new features which will help you to become a better programmer.