@piyifan
China
Joined Apr 2008
World Rank: #316 (65.6 points)
Institution: Hengyang No.8 High School, Hunan, China
Activity over the last year
Effectiveness
- Problems solved
- 215
- Solutions submitted
- 698
China
Joined Apr 2008
World Rank: #316 (65.6 points)
Institution: Hengyang No.8 High School, Hunan, China