2902: H-Sum 3s 时间限制: 1 Sec  内存限制: 128 MB 提交: 139  解决: 28 题目描述 You are given a number sequence a1,a2,a3...,an , your task is to find if there is a pair of interger (i,j) that ai+a(i+1)+..+aj equals to 0 and i<=j; 输入 Input consists of multiple test cas…

2905: The Sum of 1...N 时间限制: 1 Sec  内存限制: 128 MB 提交: 281  解决: 51 题目描述 Given an integer n,your task is to calculate 1+2+...+N; 输入 The first line of input contains an integer T, indicating the number of test cases (T<=20) The each test case contains a…

题目:click here #include <bits/stdc++.h> using namespace std; typedef unsigned long long ll; const int INF = 0x3f3f3f3f; ; int n; int a[M][M]; // a[i][j] 表示从[i][0]到[i][j]的和 int main() { while( ~scanf("%d", &n ) ) { memset( a, , sizeof(a)…

Problem H {sum+=i++} to Reach N Input: standard input Output:  standard output Memory Limit: 32 MB All the positive numbers can be expressed as a sum of one, two or more consecutive positive integers. For example 9 can be expressed in three such ways…

Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k.Example 1:Input:nums = [1,1,1], k = 2Output: 2Note:The length of the array is in range [1, 20,000].The range of numbers in th…

A Math game Time Limit: 2000/1000MS (Java/Others) Memory Limit: 256000/128000KB (Java/Others) Submit Statistic Next Problem Problem Description Recently, Losanto find an interesting Math game. The rule is simple: Tell you a number H, and you can choo…

给定一个正数数列,我们可以从中截取任意的连续的几个数,称为片段.例如,给定数列{0.1, 0.2, 0.3, 0.4},我们有(0.1) (0.1, 0.2) (0.1, 0.2, 0.3) (0.1, 0.2, 0.3, 0.4) (0.2) (0.2, 0.3) (0.2, 0.3, 0.4) (0.3) (0.3, 0.4) (0.4) 这10个片段. 给定正整数数列,求出全部片段包含的所有的数之和.如本例中10个片段总和是0.1 + 0.3 + 0.6 + 1.0 + 0.2 + 0.5…

Mysql 常用 SQL 语句集锦 基础篇 //查询时间,友好提示 $sql = "select date_format(create_time, '%Y-%m-%d') as day from table_name"; //int 时间戳类型 $sql = "select from_unixtime(create_time, '%Y-%m-%d') as day from table_name"; //一个sql返回多个总数 $sql = "select…

妈妈呀....这简直是目前死得最惨的一次. 贴题目: http://poj.org/problem?id=3233 Matrix Power Series Time Limit: 3000MS Memory Limit: 131072K Total Submissions: 19128 Accepted: 8068 Description Given a n × n matrix A and a positive integer k, find the sum S = A + A2 + A3 +…

题目链接 http://codeforces.com/problemset/gymProblem/100703/I Description standard input/outputStatements As a matter of fact, Dragon knows what Prince is interested in now. Prince uses to spend his rare off days learning different courses and trainings.…