Leetcode:516. Longest Palindromic Subsequence Leetcode:516.LongestPalindromicSubsequence参考:http://algorithms.tutorialhorizon.com/longest-palindromic-subsequence/ (老外写的博文,有图有字很形象)http://blog.csdn.net/thesnowboy_2/article/details/55251028(中文博客 ...
leetcode 5. Longest Palindromic Substring就是求连续子串的。 Given a string s, find the longest palindromic subsequence’s length in s. You may assume that the maximum length of s is 1000. 找到一个字符串的最长回文子序列,这里注意回文子串和回文序列的区别。子序列不要求连续,子串(substring)是要求...
Can you solve this real interview question? Longest Palindromic Subsequence - Given a string s, find the longest palindromic subsequence's length in s. A subsequence is a sequence that can be derived from another sequence by deleting some or no elements
classSolution {public:stringlongestPalindrome(strings) {intn=s.size();booldp[n][n]={false};for(inti=0;i<n;++i) dp[i][i]=true;for(inti=0;i+1<n;++i) dp[i][i+1]=(s[i]==s[i+1]);for(inti=n-1-2;i>=0;--i)for(intj=i+2;j<n;++j) dp[i][j]= (dp[i+1][j-...
LeetCode 516. Longest Palindromic Subsequence 阅读目录 问题链接 题目解析 解题思路 参考代码 问题链接 LeetCode 516 题目解析 求最长回文子序列。 解题思路 子序列和子串有区别的,子序列不需要连续,相对位置递增即可。 动态规划。对于任意字符串,如果头尾字符相同,那么字符串的最长回文子序列等于去掉首尾的字符串的...
Given a string s, find the longest palindromic subsequence’s length in s. You may assume that the maximum length of s is 1000. 找到一个字符串的最长回文子序列,这里注意回文子串和回文序列的区别。子序列不要求连续,子串(substring)是要求连续的。leetcode 5. Longest Palindromic Substring...
516. Longest Palindromic Subsequence 214. Shortest Palindrome 2472. Maximum Number of Non-overlapping Palindrome Substrings 2131. Longest Palindrome by Concatenating Two Letter Words 336. Palindrome Pairs 409. Longest Palindrome Given a string s which consists of lowercase or uppercase letters, return ...
One possible longest palindromic subsequence is "bb". 1. 2. 3. 4. 5. 6. 分析 题目的意思是:找出s中最长回文子序列的长度。 这道题目用了dp的方法,dp[i][j]表示字符串位置i到位置j的最长回文子串的长度,我们从后往前遍历更新。 如果s[i]==s[j],那么i和j就可以增加2个回文串的长度,我们知道中...
LeetCode 516. Longest Palindromic SubsequenceGiven 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: 4 One possible longest palindromic subsequence is “bbbb”. Example 2: Input: ...
One possible longest palindromic subsequence is "bbbb". Example 2: Input: "cbbd" Output: 2 One possible longest palindromic subsequence is "bb". 这道题给了我们一个字符串,让我们求最大的回文子序列,子序列和子字符串不同,不需要连续。而关于回文串的题之前也做了不少,处理方法上就是老老实实的两...