Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example: Input: "babad" Output: "bab" Note: "aba" is also a valid answer. Input: "cbbd" Output: &qu…

1.问题描述 给定一个字符串(序列),求该序列的最长的回文子序列. 2.分析 需要理解的几个概念: ---回文 ---子序列 ---子串 http://www.cnblogs.com/LCCRNblog/p/4321398.html这一篇文章描述了利用动态规划求解两个序列的最长公共子序列(Longest Common Sequence). 假设LCS(X,Y)表示序列X,Y的最长公共子序列,LPS(X)表示X的最长回文子序列: 在设序列X1为X的装置序列(逆序),比如X=“123”,X1=“32…

这算是一道经典的题目了,最长回文子串问题是在一个字符串中求得满足回文子串条件的最长的那一个.常见的解题方法有三种: (1)暴力枚举法,以每个元素为中心同时向左和向右出发,复杂度O(n^2): (2)动态规划法,复杂度O(n^2).设f[i][j]表示[i,j]之间最长回文子串,递推方程见链接. 对于暴力枚举的方法,这里有一个简单的Java实现,要好好理解. public String longestPalindrome(String s) { int start = 0, end = 0; in…

LeetCode(4) || Longest Palindromic Substring 与 Manacher 线性算法 题记 本文是LeetCode题库的第五题,没想到做这些题的速度会这么慢,工作之余全部耗在这上面了,只怪自己基础差.本文主要介绍使用Manacher线性算法来求解字符串的最长回文子字符串. 题目 Given a string S, find the longest palindromic substring in S. You may assume that the maxim…

Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. 方法: Manacher's algorithm,具体看这里http://leetcode.com/2011/11/longest-palindrom…

Question:Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring.(给定一个字符串S,在S中找到最长的回文子字符串,假定最长的回文字符串长度是1000,并且在这个字符串中存在唯一的一个最长回文子字符串…

Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. 思路:如果不用动态规划,在两个for循环的情况下,还得依次比较i,j间的每个字符,O(n3).使用动态规划,O(n2) char* longestPa…

题目来源:https://leetcode.com/problems/longest-palindromic-substring/ Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. 动态规划,类似于l…

Longest Palindromic Substring Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. time=255ms    accepted 暴力遍历 public String lon…

Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. 玩了两天dota2,罪过罪过,还是应该老老实实刷题啊. 题目求得是最长的回文子串,这里使用的是暴力的解法,也就是解决两种回文"asdsa"以…