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…
Problem Description Professor Zhang has kinds of characters and the quantity of the i-th character is ai. Professor Zhang wants to use all the characters build several palindromic strings. He also wants to maximize the length of the shortest palindro…
题目链接: Keep On Movin Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description Professor Zhang has kinds of characters and the quantity of the i-th character is ai. Professor Zhang wants to use all the…
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…