| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 23 | 23 [R4E]区间异或和 | 106 / 441 | 7 | |
| 88 | 88 [R15D]二维异或和 | 201 / 654 | 6 | |
| 178 | 178 [R29E]矩形求和 | 29 / 214 | 8 | |
| 196 | 196 [R32E]回文串 | 46 / 286 | 8 |
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