| Problem ID | Title | Solved | Submit | Pass Rate |
|---|---|---|---|---|
| 4072 | Petya and Tree | 3 | 5 | 60.0% |
| 4095 | Diverging Directions | 8 | 13 | 61.5% |
| 4110 | Red-Black Cobweb | 1 | 1 | 100.0% |
| 4636 | Connecting Universities | 14 | 22 | 63.6% |
| 4914 | Ants in Leaves | 1 | 1 | 100.0% |
| 4947 | 跑道 | 1 | 4 | 25.0% |
| 4952 | Kingdom and its Cities | 1 | 1 | 100.0% |
| 4977 | Minimum spanning tree for each edge | 1 | 1 | 100.0% |
| 4983 | Power Tree | 1 | 1 | 100.0% |
| 4992 | Pastoral Oddities | 1 | 1 | 100.0% |
| 5000 | Acyclic Organic Compounds | 1 | 1 | 100.0% |
| 5013 | Sandy and Nuts | 1 | 1 | 100.0% |