| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 382 | P382 并查集 | 87 / 152 | 普及- | |
| 454 | P454 亲戚 | 78 / 293 | 普及- | |
| 455 | P455 朋友 | 58 / 128 | 普及- | |
| 456 | P456 食物链 | 21 / 56 | 提高+/省选- | |
| 457 | P457 团伙 | 23 / 42 | 普及+/提高 | |
| 469 | P469 Circumferences | 3 / 5 | 普及/提高- | |
| 784 | P784 How Many Answers Are Wrong | 3 / 4 | 提高+/省选- |
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