思路: dp好题,dp[i][j]表示到前i个字符为止并且以s[i]为结尾,共有多少个长度为j的不同的子序列. 实现: #include <bits/stdc++.h> using namespace std; typedef long long ll; ll dp[][], sum[]; ]; int main() { int n; ll m; string s; while (cin >> n >> m >> s) { memset(dp, , size…
题目链接: C. Subsequences time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output For the given sequence with n different elements find the number of increasing subsequences with k + 1 elements. It is…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2227 Find the nondecreasing subsequences Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) …
H. Hashing time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output In this problem you are given a byte array a. What you are going to do is to hash its subsequences. Fortunately you don't have to…
Friends and Subsequences 题目链接: http://acm.hust.edu.cn/vjudge/contest/121333#problem/H Description Mike and !Mike are old childhood rivals, they are opposite in everything they do, except programming. Today they have a problem they cannot solve on the…
C. Subsequences Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/597/problem/C Description For the given sequence with n different elements find the number of increasing subsequences with k + 1 elements. It is guaranteed tha…
Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Stand…
