瑞洋 董
@keepsea
China, 衡水
Joined Jun 2021
World Rank: #9715 (3.6 points)
Institution: 衡水二中
Activity over the last year
Effectiveness
- Problems solved
- 28
- Solutions submitted
- 188
China, 衡水
Joined Jun 2021
World Rank: #9715 (3.6 points)
Institution: 衡水二中