UVA - 11404 Palindromic Subsequence 题意:一个字符串,删去0个或多个字符,输出字典序最小且最长的回文字符串 不要求路径区间DP都可以做 然而要字典序最小 倒过来求LCS,转移同时维护f[i][j].s为当前状态字典序最小最优解 f[n][n].s的前半部分一定是回文串的前半部分(想想就行了) 当s的长度为奇时要多输出一个(因为这样长度+1,并且字典序保证最小(如axyzb  bzyxa,就是axb|||不全是回文串的原因是后半部分的字典序回文串可能不是最小,多…

Palindromic Subsequence Time Limit: 3000ms Memory Limit: 131072KB This problem will be judged on UVA. Original ID: 1140464-bit integer IO format: %lld      Java class name: Main   A Subsequence is a sequence obtained by deleting zero or more characte…

 Palindromic Subsequence Time Limit:3000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu Submit Status Practice UVA 11404 #include <stdio.h> #include <string.h> #include <algorithm> #include <string> #include <iostrea…

题目传送门 题意:求LPS (Longest Palidromic Subsequence) 最长回文子序列.和回文串不同,子序列是可以不连续的. 分析:1. 推荐->还有一种写法是用了LCS的思想,dp[i][j]表示i到j的最长回文串长度,状态转移方程: 1. dp[j][j+i-1] = dp[j+1][j+i-2] + 2; (str[j] == str[j+i-1]) 2. dp[j][j+i-1] = max (dp[j+1][j+i-1], dp[j][j+i-2]); (str[…

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". Example 2:Input:…

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". Example 2:Input:…

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". Example 2:Input:…

［抄题］: 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". [暴力解法]: 时间分…

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". Example 2:Input:…

Longest Palindromic Subsequence 题解 题目来源:https://leetcode.com/problems/longest-palindromic-subsequence/description/ Description Given a string s, find the longest palindromic subsequence's length in s. You may assume that the maximum length of s is 10…