Problem Description Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge). In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n. Input The input will consist of a series of integers n, one integer per line. Output For each…

I found summary of k Sum problem and solutions in leetcode on the Internet. http://www.sigmainfy.com/blog/summary-of-ksum-problems.html…

https://en.wikipedia.org/wiki/Subset_sum_problem In computer science, the subset sum problem is an important problem in complexity theory and cryptography. The problem is this: given a set (or multiset) of integers, is there a non-empty subset whose…

Sum Problem Time Limit: 1000/500 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 338086    Accepted Submission(s): 85117 Problem Description Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge). In this pro…

The sum problem Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 12422 Accepted Submission(s): 3757 Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possible sub…

We have a lot of ways to solve the maximum subsequence sum problem, but different ways take different time. 1.Brute-force algorithm int maxSubSum1(const vector<int> &a) { int maxSum=0; for(int i=0;i<a.size();i++) for(int j=i;j<a.size();j++…

The sum problem Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possible sub-sequences that the sum of the sub-sequence is M.   Input Input contains multiple test cases. each case contains two integers N, M( 1 <=…

/* Name: NYOJ--927--The partial sum problem Author: shen_渊 Date: 15/04/17 19:41 Description: DFS,和 NYOJ--1058--dfs--部分和问题 基本一致,递归的i+1注意了,其他没什么 */ #include<cstring> #include<iostream> using namespace std; void dfs(int); ],vis[]; int n,k,sum,fla…

  继续讲故事~~   上次讲到我们的主人公丁丁,用神奇的动态规划法解决了杂货店老板的两个找零钱问题,得到了老板的肯定.之后,他就决心去大城市闯荡了,看一看外面更大的世界.   这天,丁丁刚回到家,他的弟弟小连就拦住了他,"老哥,有个问题想请教你."对于一向数学见长的小连,这次竟然破天荒的来问自己问题,丁丁感到不可思议:他俩一个以计算机见长,一个以数学见长,各自心里都有点小骄傲,不会轻易地向对方问问题.丁丁迟疑了一会儿,慢慢说道:"有什么问题是我们数学小天才解决不了的?&qu…

The sum problem Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 31453    Accepted Submission(s): 9414 Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possib…