题目: 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:用Manacher算法得到最大回文子串的长度,得到带#的最大回文子串,用split剔除#后转化成String形式输出即可. public…

int sta = 0; int max = 1; public String longestPalindrome(String s) { /* 判断回文有两种: 1.最大回文子序列求长度: 用动态规划,dp[sta][end] 代表开头为sta.结尾为end的部分最大回文子序列的长度是多少 dp[sta][end] = (s.charAt(sta)==s.charAt(end))?dp[sta+1][end-1]+2:max(dp[sta][end-1],dp[sta+1][end]) 2.最…

问题描述 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. 所谓回文字符串,就是一个字符串,从左到右读和从右到左读是完全一样的.比如"a" , "aaabbaaa" 之前…

首先讲讲什么是回文, 看看Wiki是怎么说的:回文,亦称回环,是正读反读都能读通的句子.亦有将文字排列成圆圈者,是一种修辞方式和文字游戏.回环运用得当.能够表现两种事物或现象相互依靠或排斥的关系, 比方madam,abba,这样正反都一样的串就是回文串. 今天要写的问题了就是在一个字符串中找出最长的回文字串.比方串:"abcdedabakml". 他的最长回文字串就是"abcdedaba".一般的方法有暴力法,动态规划法,今天来写一个时间复杂度为O(n)的算法. 回…

Given a string s, find the longest palindromic subsequence's length in s. You may assume that the maximum length of s is 1000.Example 1:Input:"bbbab"Output:4One possible longest palindromic subsequence is "bbbb".Example 2:Input:"c…

Leetcode 5. Longest Palindromic Substring(最长回文子串, Manacher算法) Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example 1: Input: "babad" Output: "bab" Note: "aba&q…

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 which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. This is case sensitive, for example "Aa" is not considered a palindrome here. Note:Assume the lengt…

写在前面:忍不住吐槽几句今天上海的天气,次奥,鞋子里都能养鱼了...裤子也全湿了,衣服也全湿了,关键是这天气还打空调,只能瑟瑟发抖祈祷不要感冒了.... 前后切了一百零几道leetcode的题(solution同步在github),主要是拣难度系数定为easy的水题做...好吧,这是第一道算法题.不知哪位大神说的,所有的语言都会过时,只有数据结构和算法才是永恒. 今天要重点讲的是优雅的Manacher算法,先来看这道题Longest Palindromic Substring,题目很简单,给你一…

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…