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...
https://leetcode.com/problems/longest-palindromic-subsequence/description/ 一个例子: 令数组为a,画一个行列为a长度的矩阵,令为T 回到顶部 首先看长度等于1的情况: 也就是只看一个元素,比如只看a[0]这个元素,也就是一个a,显然最长回文序列是1。只看a[1],即g,显然最长回文序列为1。其实也就是 T[i][...
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 ...
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
Leetcode 516. Longest Palindromic Subsequence 简介: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就是求连续子串的。 Given a string s, find the longest palindromic subsequence’s length in s. ...
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...
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...
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: ...
[LeetCode] Longest Palindromic Subsequence 最长回文子序列 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: 4 One possible longest palindromic subsequence is "bbbb". ...
https://leetcode.com/problems/longest-palindromic-subsequence/description/ 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: 4 One possible longest palindromic subsequence is “...