Solve problems from past contests at your own pace
Sharing and discussing on social media is welcome. Looking things up in textbooks or online is fine too. Please avoid directly revealing answers to others.
| Problem | Difficulty | Points |
|---|---|---|
| Lv.2 Beginner | 100 pts | |
| Lv.3 Elementary | 210 pts | |
| Lv.4 Elementary | 300 pts | |
| Lv.4 Elementary | 330 pts | |
| Lv.3 Elementary | 100 pts | |
| Lv.5 Elementary | 320 pts | |
| Lv.5 Elementary | 380 pts | |
| Lv.6 Intermediate | 500 pts | |
| Lv.8 Intermediate | 750 pts | |
| Lv.1 Beginner | 100 pts |