Welcome to FLYIOI

  Problem Set is the place where you can find large amount of problems from different programming contests. Online Judge System allows you to test your solution for every problem.

  First of all, read carefully Frequently Asked Questions.
  Then, choose problem, solve it and submit it.

  If you want to publish your problems or setup your own online contest, just write us

  Designer: Ying Fuchen
  Developer:Xu Pengcheng   Ying Fuchen