子串 (substring.cpp/c/pas) [问题描述] 有两个仅包含小写英文字母的字符串 A 和 B.现在要从字符串 A 中取出 k 个 互不重 叠 的非空子串,然后把这 k 个子串按照其在字符串 A 中出现的顺序依次连接起来得到一 个新的字符串,请问有多少种方案可以使得这个新串与字符串 B 相等?注意:子串取出 的位置不同也认为是不同的方案. [输入格式] 输入文件名为 substring.in. 第一行是三个正整数 n,m,k,分别表示字符串 A 的长度,字符串 B 的长度,以及问…
dp的优化可能是自己的弱项吧 F1中n*n*n的复杂度强行过去了 F2就无能为力了: 状态转移 dp[ i ] [ j ] 第一个i存的是位置 1-n; j是放入数字的个数 然后F1就暴力过去了 #include<bits/stdc++.h> #define int long long using namespace std; +; int dp[maxn][maxn]; int a[maxn]; int32_t main() { int n,k,x; cin>>n>&…
Arithmetic Sequence Time Limit: 1 Sec Memory Limit: 128 MBSubmit: 1810 Solved: 311[Submit][Status][Web Board] Description Giving a number sequence A with length n, you should choosing m numbers from A(ignore the order) which can form an arithmetic…
[Usaco2005 Dec] Cleaning Shifts 清理牛棚 题目描述 Farmer John's cows, pampered since birth, have reached new heights of fastidiousness. They now require their barn to be immaculate. Farmer John, the most obliging of farmers, has no choice but hire some of th…
A. Beru-taxi time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vasiliy lives at point (a, b) of the coordinate plane. He is hurrying up to work so he wants to get out of his house as soon as…
Count the string Problem Description It is well known that AekdyCoin is good at string problems as well as number theory problems. When given a string s, we can write down all the non-empty prefixes of this string. For example:s: "abab"The prefi…
3851: 2048 Time Limit: 2 Sec Memory Limit: 64 MBSubmit: 22 Solved: 9[Submit][Status] Description Teacher Mai is addicted to game 2048. But finally he finds it's too hard to get 2048. So he wants to change the rule: You are given some numbers. Every…
