public class Solution { /** * @param s: input string * @return: the longest palindromic substring */ public String longestPalindrome(String s) { // write your code here char[] S = s.toCharArray(); int sLength =
Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique longest palindromic substring. Hide Tags String 利用DP思想做 dp[i][j]表示了第字符串中,s[i,i+1,……, j]是否是回文 可以有以下递推公式: if(i==j)...
【LeetCode】5. Longest Palindromic Substring 陌儿的百科全书 来自专栏 · LeetCode 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 1: Input: "babad" Output: "bab" Note: "aba" is also a valid answer. ...
所有的状态在转移的时候可能性都是唯一的。 边界条件即单字符或双字符子串。枚举每一种边界条件,并从对应的子串开始不断地向两边扩展,直到两边的字母不同为止。 「边界条件」对应的子串实际上就是我们「扩展」出的回文串的「回文中心」。枚举所有的「回文中心」并尝试「扩展」,直到无法扩展为止,此时的回文串长度即...
原题链接 :leetcode.com/problems/l Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. 给定字符串 s,找到 s 中最长的回文字符串,可以假定 s 的最大长度是 1000。 Example 1: Input: "babad" Output: "bab" Note: "aba" is...
Can you solve this real interview question? Longest Palindromic Substring - Given a string s, return the longest palindromic substring in s. Example 1: Input: s = "babad" Output: "bab" Explanation: "aba" is also a valid answer. Example 2: Input
一发现不满足的情况立即break进行下一个中心字符的推断,代码例如以下: class Solution { public: string longestPalindrome(string s) { string ans; int len=s.length(); int maxLength=-1,CurLen,Sbegin; for(int i=0;i<len;i++) { int left=i-1,right=i+1; while(left>=0&&right<len&&s[left]...
首先,我们通过在字母之间插入特殊字符'#'来将输入字符串S转换为另一个字符串T,这么做的原因很快就会很快清楚。例如:S =“abaaba”,T =“#a#b#a#a#b#a...
[LeetCode]5. Longest Palindromic Substring (medium) 5. Longest Palindromic Substring (medium) Brute force 找出所有可能的子串(窗口),O(n^2),再判断是否为回文,O(n^2),所以总的时间复杂度为O(n^3),Time Limit Exceeded Dynamic Programming 1. 用递归的方式实现P(i,j)会导致 Time Limit Exceeded...
方法/步骤 1 题目叙述Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique longest palindromic substring.2 本体可以使用动态规划去解答，但是我用了之后没能AC，也可以使用从中间向两边延伸去查找最长回文子串。先提供第...