题目大意:求两个字符串的最长公共子序列的长度. 分析:这是一个典型的dp入门题,LCS. 代码: #include<bits/stdc++.h> using namespace std; ; char a[maxn],b[maxn]; int dp[maxn][maxn]; void Dp() { int n = strlen(a); int m = strlen(b); ; i < n; i++) { ; j < m; j++) { if (a[i] == b[j]) dp[i…
public class Solution { /** * @param A, B: Two string. * @return: the length of the longest common substring. */ public int longestCommonSubsequence(String A, String B) { int lenA = A.length(); int lenB = B.length(); if(lenA==0 || lenB==0){ return 0;…
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…
最长公共子序列 英文缩写为LCS(Longest Common Subsequence).其定义是,一个序列 S ,如果分别是两个或多个已知序列的子序列,且是所有符合此条件序列中最长的,则 S 称为已知序列的最长公共子序列.而最长公共子串(要求连续)和最长公共子序列是不同的 应用 最长公共子序列是一个十分实用的问题,它可以描述两段文字之间的“相似度”,即它们的雷同程度,从而能够用来辨别抄袭.对一段文字进行修改之后,计算改动前后文字的最长公共子序列,将除此子序列外的部分提取出来,这种方法判断修改的…
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…
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…
http://www.lightoj.com/volume_showproblem.php?problem=1013 Yes, you are developing a 'Love calculator'. The software would be quite complex such that nobody could crack the exact behavior of the software. So, given two names your software will gene…
http://acm.hust.edu.cn/vjudge/contest/view.action?cid=74662#problem/C A B C D E C - Largest Rectangle in a Histogram Time Limit:3000MS Memory Limit:0KB 64bit IO Format:%lld & %llu Submit Status Practice UVA 111 Description Background Many…
History Grading Background Many problems in Computer Science involve maximizing some measure according to constraints. Consider a history exam in which students are asked to put several historical events into chronological order. Students who order…
