油饼 食不食
@kunkun2007
China, 北京
Joined Jan 2023
World Rank: #12313 (2.8 points)
Institution: 北京第二中学
Activity over the last year
Effectiveness
- Problems solved
- 30
- Solutions submitted
- 150
China, 北京
Joined Jan 2023
World Rank: #12313 (2.8 points)
Institution: 北京第二中学