| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 1509 | AcWing842 排列数字 | 44 / 64 | 1 | |
| 1510 | AcWing843 n-皇后问题 | 29 / 61 | 4 | |
| 1512 | AcWing846 树的重心 | 7 / 12 | 9 | |
| 1555 | 1555 [NOIP2017 普及组] 棋盘 | 1 / 3 | 10 |
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