人生如梦，浮华一瞬间的专栏

Is It A Tree?Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 17755    Accepted Submission(s): 3985Problem DescriptionA tree is a

1326: The contestTime Limit: 1 Sec  Memory Limit: 128 MBSubmit: 569  Solved: 181[Submit][Status][Web Board]Description  殷犇有很多队员。他们都认为自己是最强的，于是，一场比赛开始了~  于是安叔主办了一场比赛，比赛有n个题目，每个题目都

时间限制:20000ms单点时限:1000ms内存限制:256MB描述这天天气晴朗、阳光明媚、鸟语花香，空气中弥漫着春天的气息……额，说远了，总之，小Hi和小Ho决定趁着这朗朗春光出去玩。但是刚刚离开居住的宾馆不久，抄近道不小心走入了一条偏僻小道的小Hi和小Ho就发现自己的前方走来了几个彪形大汉，定睛一看还都是地地道道的黑人兄弟！小Hi和小Ho这下就慌了

这是朴素查找的代码,适合数据量不大的情况：int findx(int x){ int r=x; while(parent[r] !=r) r=parent[r]; return r;}       下面是采用路径压缩的方法查找元素：int find(int x) //查找x元素所在的集合,回溯时压缩路径{ if (x

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 8352    Accepted Submission(s): 3584Problem DescriptionBenny has a spacious farm land

A graph which is connected and acyclic can be considered a tree. The height of the tree depends on the selected root. Now you are supposed to find the root that results in a highest tree. Such a root

When register on a social network, you are always asked to specify your hobbies in order to find some potential friends with the same hobbies. A "social cluster" is a set of people who have some of th