按常见算法和思维模型分章，适合专题补弱、课后作业和阶段复习。当前收录 ABC457–ABC475 中精选的 66 道题。
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练习建议
建议先完成基础、模拟和预处理章节，再进入数据结构、动态规划和综合题。每题先独立思考，记录错误原因；同类错误重复出现时，应回到对应章节补练。
章节 6. 动态规划与状态设计
开放
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| abc459e Select from Subtrees | 0 | 0 | 5 |
| abc464d Celester | 15 | 4 | 3 |
| abc466e Range Flip | 0 | 0 | 4 |
| abc465e Digit Circus | 0 | 0 | 5 |
| abc473d Coefficient Stair | 0 | 0 | 3 |
| abc470e Concentration | 0 | 0 | 5 |
章节 7. 图论、树与计算几何
开放
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| abc460d Repeatedly Repainting | 13 | 5 | 4 |
| abc463e Roads and Gates | 0 | 0 | 4 |
| abc465d X to Y | 0 | 0 | 3 |
| abc460b Two Rings | 5 | 5 | 2 |
| abc467d Concentric Circles | 0 | 0 | 3 |
| abc472d Bomber Mad | 0 | 0 | 3 |
| abc472e Odd Cycle | 0 | 0 | 4 |
章节 8. 数学、组合与同余
开放
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| abc458e Count 123 | 5 | 0 | 5 |
| abc462e Alternating Costs | 11 | 0 | 5 |
| abc467c Adjacent Sums (easy) | 9 | 1 | 3 |
| abc468c Between P and Q | 2 | 1 | 3 |
| abc468e Sum of Average | 0 | 0 | 4 |
| abc471e Sum of Square of Sum | 1 | 1 | 4 |
| abc474d Outweigh | 2 | 0 | 3 |
| abc475d Alphametic Prime | 0 | 0 | 3 |
章节 9. 思维转换与综合题
开放
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| abc457d Raise Minimum | 104 | 27 | 4 |
| abc459d Adjacent Distinct String | 23 | 7 | 4 |
| abc466d Placing Rooks | 4 | 1 | 3 |
| abc469d The Big Two | 6 | 0 | 3 |
| abc469e Pro Exam Eligibility | 3 | 0 | 4 |
| abc470d Inverse and Swap | 0 | 0 | 3 |
| abc474c Remove and Append | 0 | 0 | 3 |
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Sam (ming)
