蜗牛慢慢爬 LeetCode 5.Longest Palindromic Substring [Difficulty: Medium]

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蜗牛慢慢爬 LeetCode 5.Longest Palindromic Substring [Difficulty: Medium]

题目 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. Example: Input: "cbbd"…

蜗牛慢慢爬 LeetCode 2. Add Two Numbers [Difficulty: Medium]

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蜗牛慢慢爬 LeetCode 3. Longest Substring Without Repeating Characters [Difficulty: Medium]

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LeetCode(4) || Longest Palindromic Substring 与 Manacher 线性算法

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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…

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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…

LeetCode 5 Longest Palindromic Substring（最长子序列）

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[LeetCode] 5. Longest Palindromic Substring 最长回文子串

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" is also a valid answer. Example 2: Input: "cbbd"…

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leetcode 5 :Longest Palindromic Substring 找出最长回文子串

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[leetcode]5. Longest Palindromic Substring最长回文子串

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" is also a valid answer. Example 2: Input: "cbbd"…

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[LeetCode] 5. 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. 求字符串中的最大回文子串(从左往右和从右往左读一样的子串). Example: Input: "babad" Output: "bab" Note: "aba" is also a valid answer. Exam…

LN : leetcode 5 Longest Palindromic Substring

lc 5 Longest Palindromic Substring 5 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. Example: Input: "babad" Output: "bab" Note: "ab…

Leetcode 之Longest Palindromic Substring（30）

很经典的一道题,最长回文子串,有多种方法. 首先介绍的一种方法是从中间向两边展开.注意区分aba和abba型的回文串:如果当前最长的子串已经当于两边中最长的子串了,则无需再去判断. //从中间向两边展开 string expandAroundCenter(string s, int c1, int c2) { int l = c1, r = c2; int n = s.length(); && r <= n - && s[l] == s[r]) { l--; r++;…

LeetCode：5. Longest Palindromic Substring（Medium）

原题链接:https://leetcode.com/problems/longest-palindromic-substring/description/ 1. 题目要求:找出字符串中的最大回文子串 2. 注意:要考虑回文子串中的字符个数是奇数还是偶数!!! 例如,“aabaa”是一个奇数个字符的回文字符串,他的中心只有一个字符“b”. “aabbaa”是一个偶数个字符的回文字符串,他的中心却有两个相同字符“bb” 3. 思路:暴力解决,以每个字符为中心,对该字符的两边进行匹配,找出最长的回文子…

【Leetcode】Longest Palindromic Substring

问题:https://leetcode.com/problems/longest-palindromic-substring/ 给定一个字符串 S,求出 S 的最长回文子串思路: 1. 回文:一个字符串从前和从后读一致.S = "ABBA" 从前读:ABBA,从后读:ABBA 2. 最简单的做法:列出所有的子串,并判断是否是回文,从中找出最长的. 表格列出了所有的子串,第 i 行是以 S 的第 i 个字符开始的子串.S = "ABBA" 1 A AB A…

LeetCode 5 Longest Palindromic Substring manacher算法,最长回文子序列,string.substr(start,len) 难度:2

https://leetcode.com/problems/longest-palindromic-substring/ manacher算法相关:http://blog.csdn.net/ywhorizen/article/details/6629268 class Solution { public: string longestPalindrome(string s) { char ch[2001];int p[2001]; ch[2*s.size()] = 0; for(int i =…

leetcode 5. Longest Palindromic Substring [java]

public String longestPalindrome(String s) { String rs = ""; int res = 0; for(int i = 0; i< s.length(); i++){ int left = i, right = i; while(left >= 0 && s.charAt(i) == s.charAt(left)) left --; while(right < s.length() &&…

LeetCode——5.Longest Palindromic Substring

一.题目链接:https://leetcode.com/problems/longest-palindromic-substring/ 二.题目大意: 给定一个字符串,找出它最长的回文子串.例如,字符串“caabb”,它的最长回文子串为“aabb”. 三.题解: 找最长回文子串应该说是比较经典的题目,这个题目我目前有三种思路: 方法1:暴力解决,找出所有的子串,并判断子串是不是回文,然后记录最长的回文子串.代码如下: class Solution { public: string longest…

蜗牛慢慢爬 LeetCode 23. Merge k Sorted Lists [Difficulty: Hard]

题目 Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. 翻译合并k个有序的链表 Hints Related Topics: LinkedList, Divide and Conquer, Heap Solution1:Divide and Conquer 参考归并排序-维基百科思路:分治,先分成两个子任务,然后递归子任务,最后回溯回来..这里就…

蜗牛慢慢爬 LeetCode 9. Palindrome Number [Difficulty: Easy]

题目 Determine whether an integer is a palindrome. Do this without extra space. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of using extra space. You could a…