Codeforce 1000 D. Yet Another Problem On a Subsequence 解析(DP) 今天我們來看看CF1000D 題目連結 題目 略,請直接看原題 前言 這題提供了我一種實用的算\(C_m^n\)的方法 @copyright petjelinux 版權所有 觀看更多正版原始文章請至petjelinux的blog 想法 考慮\(dp[i]\)為考慮到\(i\)位置為止的所以\(subsequence\)數量\(+1\)(一個都不選),解答就是\(dp[n]-…
D - Yet Another Problem On a Subsequence CodeForces - 1000D The sequence of integers a1,a2,-,aka1,a2,-,ak is called a good array if a1=k−1a1=k−1 and a1>0a1>0. For example, the sequences [3,−1,44,0],[1,−99][3,−1,44,0],[1,−99] are good arrays, and the…
The sequence of integers a1,a2,…,aka1,a2,…,ak is called a good array if a1=k−1a1=k−1 and a1>0a1>0. For example, the sequences [3,−1,44,0],[1,−99][3,−1,44,0],[1,−99] are good arrays, and the sequences [3,7,8],[2,5,4,1],[0][3,7,8],[2,5,4,1],[0] — are…
Common Subsequence Time Limit: 2 Sec Memory Limit: 64 MBSubmit: 951 Solved: 374 Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = <X1, x2, ..., xm>another sequence…
A. Substring and Subsequence 题目连接: http://codeforces.com/contest/163/problem/A Description One day Polycarpus got hold of two non-empty strings s and t, consisting of lowercase Latin letters. Polycarpus is quite good with strings, so he immediately w…
Problem C: Longest Common Subsequence Sequence 1: Sequence 2: Given two sequences of characters, print the length of the longest common subsequence of both sequences. For example, the longest common subsequence of the following two sequences: abcdgh…
D. Longest Subsequence 题目连接: http://www.codeforces.com/contest/632/problem/D Description You are given array a with n elements and the number m. Consider some subsequence of a and the value of least common multiple (LCM) of its elements. Denote LCM a…
题目链接: Ordered Subsequence Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Description A numeric sequence of ai is ordered if a1<a2<……<aN. Let the subsequence of the given numeric sequence (a1, a2,……,…
题目链接:http://poj.org/problem?id=1458 Common Subsequence Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 55099 Accepted: 22973 Description A subsequence of a given sequence is the given sequence with some elements (possible none) left ou…
题目链接:http://poj.org/problem?id=2533 Longest Ordered Subsequence Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 55459 Accepted: 24864 Description A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the…
题目链接:http://poj.org/problem?id=2533 描述: A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the given numeric sequence (a1, a2, ..., aN) be any sequence (ai1, ai2, ..., aiK), where 1 <= i1 < i2 < ... < iK…
E. Sonya and Problem Wihtout a Legend time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output Sonya was unable to think of a story for this problem, so here comes the formal description. You are g…
题目链接: C. Sonya and Problem Wihtout a Legend time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output Sonya was unable to think of a story for this problem, so here comes the formal description. You…
Problem F "Folding" Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100002 Description Bill is trying to compactly represent sequences of capital alphabetic characters from 'A' to 'Z' by folding repeating subsequences insid…
这是现场完整做出来的唯一一道题Orz..而且还调了很久的bug.还是太弱了. Problem When you travel, you like to spend time sightseeing in as many cities as possible, but sometimes you might not be able to because you need to catch the bus to the next city. To maximize your travel enjoy…
Problem H. Password Service 题目连接: http://www.codeforces.com/gym/100253 Description Startups are here, startups are there. Startups are everywhere! Polycarp would like to have his own startup, too. His business idea is a password service. Have you not…
题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3777 Time Limit: 2 Seconds Memory Limit: 65536 KB The 11th Zhejiang Provincial Collegiate Programming Contest is coming! As a problem setter, Edward is going to arrange the order…
C. Sonya and Problem Wihtout a Legend time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output Sonya was unable to think of a story for this problem, so here comes the formal description. You are g…
Tree chain problem Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 262 Accepted Submission(s): 59 Problem Description Coco has a tree, whose vertices are conveniently labeled by 1,2,-,n. The…
E. Sonya and Problem Wihtout a Legend time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output Sonya was unable to think of a story for this problem, so here comes the formal description. You are g…
Simple String Problem Recently, you have found your interest in string theory. Here is an interesting question about strings. You are given a string S of length n consisting of the first k lowercase letters. You are required to find two non-empty sub…
Common Subsequence A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = < x1, x2, ..., xm > another sequence Z = < z1, z2, ..., zk > is a subsequence of X if there exists a s…
A. Substring and Subsequence One day Polycarpus got hold of two non-empty strings s and t, consisting of lowercase Latin letters. Polycarpus is quite good with strings, so he immediately wondered, how many different pairs of "x y" are there, s…
The 11th Zhejiang Provincial Collegiate Programming Contest is coming! As a problem setter, Edward is going to arrange the order of the problems. As we know, the arrangement will have a great effect on the result of the contest. For example, it will…
One Person Game Time Limit: 1 Second Memory Limit: 32768 KB Special Judge There is a very simple and interesting one-person game. You have 3 dice, namely Die1, Die2 and Die3. Die1 has K1 faces. Die2 has K2 faces. Die3 has K3 faces. All the…
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…