5.Longest Palindromic Substring leetcode java
来源:互联网 发布:产业结构优化理论 编辑:程序博客网 时间:2024/05/29 11:10
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"Output: "bb"寻找字符串中的最长回文子串
思路:
回文字符串有两种,一种是类似于“aa”以字符之间的间隔为对称轴对称,另一种类似于“aba”以某个字符为对称轴对称,因此对每个字符串应检测的位置有2*length-1个(每个字符,每个间隔),用i遍历一遍,如果i是偶数,表示这个位置是字符,如果i是奇数,表示这个位置是间隔,以此为轴,向左右两边扩展检查。
class Solution { public String longestPalindrome(String s) { int len=s.length();if(len==0)return s;String res=s.substring(0, 1);for(int i=0;i<2*len-1;i++) {if(i%2==0) {int j=1;while(i/2-j>=0&&i/2+j<=len-1) {if(s.charAt(i/2-j)!=s.charAt(i/2+j))break;else {if(2*j+1>res.length())res=s.substring(i/2-j, i/2+j+1);}j++;}}else {int j=1;while((i+1)/2-j>=0&&(i-1)/2+j<=len-1) {if(s.charAt((i+1)/2-j)!=s.charAt((i-1)/2+j))break;else {if(2*j>res.length())res=s.substring((i+1)/2-j, (i-1)/2+j+1);}j++;}}} return res; }}
类似的题目:
阅读全文
0 0
- LeetCode(java)5. Longest Palindromic Substring
- leetcode-java-5. Longest Palindromic Substring
- leetcode: 5. Longest Palindromic Substring (java)
- [LeetCode] 5. Longest Palindromic Substring java
- [leetcode]5. Longest Palindromic Substring(Java)
- Leetcode 5. Longest Palindromic Substring(java版)
- 5.Longest Palindromic Substring leetcode java
- [Leetcode] Longest Palindromic Substring (Java)
- Longest Palindromic Substring leetcode java
- [LeetCode][Java]Longest Palindromic Substring
- LeetCode-Longest Palindromic subString(java)
- LeetCode : Longest Palindromic Substring [java]
- leetcode:Longest Palindromic Substring java
- [LeetCode]Longest Palindromic Substring(Java)
- [LeetCode] Longest Palindromic Substring(java)
- leetcode Longest Palindromic Substring(Java)
- LeetCode 5. Longest Palindromic Substring
- LeetCode --- 5. Longest Palindromic Substring
- Servlet
- Android Webview拦截ajax请求
- linux下的重要目录
- Cas单点登录(3)数据库验证用户之无密码加密
- Javascript模块化封装与浏览器加载
- 5.Longest Palindromic Substring leetcode java
- ES6-函数的扩展-rest参数
- 6-20 No Less Than X in BST(20 point(s))
- 什么是hashmap
- 处理Whitelabel Error Page
- at91sam9260的外部硬件时钟
- Libcurl 以JSON模式POST
- (转载)typedef使用
- springboot 集成 jpa 详解