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Pick a problem randomly based on the current filter.
| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 3012 | CSES1137 子树查询 | 0 / 0 | 2 | |
| 3013 | CSES1138 路径查询 I | 0 / 0 | 4 | |
| 668 | NOIP2020B 字符串匹配 | 0 / 0 | 5 | |
| 749 | NOIPJ2015C 推销员 | 0 / 0 | 5 | |
| 723 | NOIPS2013B 火柴排队 | 0 / 0 | 5 | |
| 680 | NOIPS2017F 列队 | 0 / 0 | 6 | |
| 384 | P1020 [NOIP1999 普及组] 导弹拦截 | 6 / 28 | 4 | |
| 1108 | 1108 小朋友排队 | 0 / 0 | 3 | |
| 436 | P1908 求逆序对 | 0 / 67 | 3 | |
| 2110 | 2110 【模板】树状数组 1(单点修改) | 7 / 18 | 3 | |
| 2111 | 2111 【模板】树状数组 2( 区间修改) | 5 / 19 | 3 | |
| 2291 | 2291 谜一样的牛 | 7 / 21 | 3 | |
| 413 | P2487 拦截导弹 | 3 / 5 | 6 | |
| 387 | P2782 友好城市 | 9 / 39 | 3 | |
| 2823 | 2823 楼兰图腾 | 2 / 6 | 3 | |
| 3288 | 3288 买票 | 1 / 3 | 3 | |
| 3289 | 3289 打鼹鼠 | 1 / 5 | 3 | |
| 3607 | 3607 「一本通 4.5 练习 1」树上操作 | 1 / 2 | 5 | |
| 3642 | 3642 2606 HW阶段测试·客观题 | 1 / 1 | 3 | |
| 614 | T1535 「一本通 4.1 例 1」数列操作 | 1 / 19 | 3 | |
| 615 | T1536 「一本通 4.1 例 2」数星星 Stars | 4 / 18 | 2 | |
| 618 | T1539 [CQOI2006] 简单题 | 1 / 9 | 3 | |
| 628 | T1549 「一本通 4.3 练习 1」最大数 | 2 / 18 | 4 | |
| 640 | T1561 「一本通 4.5 练习 1」树上操作 | 0 / 0 | 5 | |
| 1138 | T1567 「一本通 4.6 练习 2」郁闷的出纳员 | 0 / 0 | 5 | |
| 849 | USACOC1111A Above the Median | 0 / 2 | 3 | |
| 852 | USACOC1912B Sleepy Cow Sorting | 0 / 0 | 3 | |
| 3590 | abc451c 花园中的树 | 0 / 0 | 2 | |
| 3622 | abc457e Crossing Table Cloth | 1 / 2 | 3 | |
| 3663 | abc461e E-liter | 0 / 0 | 4 |
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