题目链接:http://hihocoder.com/problemset/problem/1322 时间限制:10000ms 单点时限:1000ms 内存限制:256MB 描述 给定一个包含 N 个顶点 M 条边的无向图 G ,判断 G 是不是一棵树. 输入 第一个是一个整数 T ,代表测试数据的组数. (1 ≤ T ≤ 10) 每组测试数据第一行包含两个整数 N 和 M .(2 ≤ N ≤ 500, 1 ≤ M ≤ 100000) 以下 M 行每行包含两个整数 a 和 b ,表示顶点 a 和顶…

2679:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1679 2952:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1951 ZOJ:2679先来~ 水题大意:(题目大意:我什么时候改名了哇T T) 给你一个5位数的中间三个字母,还有一个数N让你求能被N整除的最大的五位数. 思路: 直接暴力枚举.... #include<cstdio> int…

10411: F.Distribution Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 11  Solved: 8 [Submit][Status][Web Board] Description One day , Wang and Dong in the Dubai desert expedition, discovered an ancient castle. Fortunately, they found a map of the cas…

ZOJ 2819 Average Score Time Limit: 2 Sec  Memory Limit: 60 MB 题目连接 http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=5373 Description Bob is a freshman in Marjar University. He is clever and diligent. However, he is not good at math, especia…

有点类似CF某场div2T1... 前面接上1234567890000000,后面加上x+(1234567890000000%x)就可以保证是x的倍数了 #include<iostream> #include<cstring> #include<cstdlib> #include<cstdio> #include<algorithm> #define ll long long using namespace std; ,inf=1e9; int…

题意: 求H的最大值,  H是指存在H篇论文,这H篇被引用的次数都大于等于H次. 思路:题意得,  最多只有N遍论文,所以H的最大值为N, 常识得知H的最小值为0. 所以H的答案在[0,N]之间,二分搜一下,如果满足就提高下限,不满足则降低上限. 嗯就这样!!!! AC code: #include<bits/stdc++.h> using namespace std; int n; vector<); int main() { bool check(int t); while(scan…

487-3279 Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 236746   Accepted: 41288 Description Businesses like to have memorable telephone numbers. One way to make a telephone number memorable is to have it spell a memorable word or phras…

题目链接: B. Modulo Sum time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a sequence of numbers a1, a2, ..., an, and a number m. Check if it is possible to choose a non-empty subse…

Problem A: The 3n + 1 problem Time Limit: 1 Sec  Memory Limit: 64 MBSubmit: 14  Solved: 6[Submit][Status][Web Board] Description Consider the following algorithm to generate a sequence of numbers. Start with an integer n. If n is even, divide by 2. I…

Number Sequence Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 89984    Accepted Submission(s): 21437 Problem Description A number sequence is defined as follows: f(1) = 1, f(2) = 1, f(n) = (A…