string·结合·rolling·哈希 模式
5 道题目
模式页适合用来建立可复用解题框架。先识别题目特征，再按固定流程解释状态定义、转移和边界。
识别信号
- Understanding of rolling hash and string matching techniques.
- Ability to implement optimal algorithms for palindrome construction.
- Will you consider overlaps between prefix and suffix?
解题流程
- 1. 明确窗口/状态定义
- 2. 更新状态并维护约束
- 3. 用边界样例验证
常见失分点
- Overcomplicating the solution by brute-forcing palindrome checks for each substring.
- Forgetting that the prefix cannot be the entire string itself.
- Counting even-length palindromes mistakenly, which violates the problem constraint.
推荐题单梯度
#题目难度分类
214
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1392最长快乐前缀
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1960两个回文子字符串长度的最大乘积
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3029将单词恢复初始状态所需的最短时间 I
Determine the minimum seconds to revert a string to its original state using repeated prefix shifts of length k efficien…
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3031将单词恢复初始状态所需的最短时间 II
The problem asks to calculate the minimum time required to revert a string to its initial state using specific operation…
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