F - LCS Time Limit: 2 sec / Memory Limit: 1024 MB Score : 100100 points Problem Statement You are given strings ss and tt. Find one longest string that is a subsequence of both ss and tt. Notes A subsequence of a string xx is the string obtained by r…
先要搞明白:最长公共子串和最长公共子序列的区别. 最长公共子串(Longest Common Substirng):连续 最长公共子序列(Longest Common Subsequence,LCS):不必连续 实在是汗颜,网上做一道题半天没进展: 给定一个字符串s,你可以从中删除一些字符,使得剩下的串是一个回文串.如何删除才能使得回文串最长呢?输出需要删除的字符个数. 首先是自己大致上能明白应该用动态规划的思想否则算法复杂度必然过大.可是对于回文串很难找到其状态和状态转移方程,换句话…
题目链接 基础的最长公共子序列 #include <bits/stdc++.h> using namespace std; ; char c[maxn],d[maxn]; int dp[maxn][maxn]; int main() { while(scanf("%s%s",c,d)!=EOF) { memset(dp,,sizeof(dp)); int n=strlen(c); int m=strlen(d); ;i<n;i++) ;j<m;j++) if(c…
199. Beautiful People time limit per test: 0.25 sec. memory limit per test: 65536 KB input: standard output: standard The most prestigious sports club in one city has exactly N members. Each of its members is strong and beautiful. More precisely, i-t…
Advanced Fruits Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 1426 Accepted Submission(s): 719Special Judge Problem Description The company "21st Century Fruits" has specialized in c…
序列变换 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 820 Accepted Submission(s): 336 Problem Description 我们有一个数列A1,A2...An,你现在要求修改数量最少的元素,使得这个数列严格递增.其中无论是修改前还是修改后,每个元素都必须是整数.请输出最少需要修改多少个元素. …