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Pick a problem randomly based on the current filter.
| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 2140 | C1215 2024CSPJ初赛模拟题(六) | 1 / 3 | 1 | |
| 2144 | C1217 2024CSPJ初赛模拟题(八) | 1 / 9 | 1 | |
| 3055 | CSES1111 最长回文子串 | 1 / 1 | 4 | |
| 3057 | CSES2420 回文查询 | 1 / 2 | 3 | |
| 3491 | CSPJ2025C 异或和 / xor | 1 / 3 | 3 | |
| 2025 | CSPS2022C 星战 (galaxy) | 0 / 6 | 6 | |
| 2101 | CSPS2023B 消消乐 | 1 / 27 | 5 | |
| 3487 | CSPS2025C 谐音替换 / replace | 0 / 0 | 6 | |
| 668 | NOIP2020B 字符串匹配 | 0 / 0 | 5 | |
| 733 | NOIPJ2018D 对称二叉树 | 0 / 0 | 4 | |
| 689 | NOIPS2014F 解方程 | 0 / 0 | 5 | |
| 1262 | 1262 【入门】重复的学号 | 0 / 0 | 1 | |
| 1490 | 1490 A-B 数对 | 9 / 44 | 2 | |
| 2096 | P2096 CSP 2022 提高级第一轮 | 1 / 17 | 3 | |
| 2098 | P2098 CSP 2021 提高级第一轮 | 1 / 8 | 3 | |
| 2099 | P2099 CSP 2020 提高级第一轮 | 1 / 5 | 3 | |
| 2119 | 2119 不重复区间 | 1 / 3 | 2 | |
| 3642 | 3642 2606 HW阶段测试·客观题 | 1 / 1 | 3 | |
| 3645 | 3645 提货 | 0 / 0 | 3 | |
| 528 | T1449 「一本通 1.4 例 2」魔板 | 1 / 20 | 3 | |
| 532 | T1453 「一本通 1.4 练习 3」移动玩具 | 0 / 0 | 4 | |
| 535 | T1456 「一本通 2.1 例 2」图书管理 | 1 / 8 | 3 | |
| 539 | T1460 「一本通 2.1 练习 4」A Horrible Poem | 0 / 0 | 4 | |
| 540 | T1461 「一本通 2.1 练习 5」Beads | 1 / 5 | 3 | |
| 541 | T1462 「一本通 2.1 练习 6」Antisymmetry | 1 / 3 | 5 | |
| 542 | T1463 「一本通 2.1 练习 7」门票 | 0 / 1 | 3 | |
| 543 | T1464 「一本通 2.1 练习 8」收集雪花 | 1 / 3 | 3 | |
| 797 | USACO325 Magic Squares | 0 / 0 | 2 |
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