题目大意:将多个电脑通过网线连接起来,不断查询2台电脑之间是否连通. 问题来源:中国大学mooc 05-树8 File Transfer (25 分) We have a network of computers and a list of bi-directional connections. Each of these connections allows a file transfer from one computer to another. Is it possible to send…

05-树8 File Transfer(25 point(s)) We have a network of computers and a list of bi-directional connections. Each of these connections allows a file transfer from one computer to another. Is it possible to send a file from any computer on the network to…

对于一个集合常见的操作有:判断一个元素是否属于一个集合:合并两个集合等等.而并查集是处理一些不相交集合(Disjoint Sets)的合并及查询问题的有利工具. 并查集是利用树结构实现的.一个集合用一棵树来表示,而多个集合便是森林.并查集中的“并”是将两个集合合并即两棵树合并成一颗树:“查”是查找一个元素属于哪个集合,即查找一个节点属于哪棵树.思路如下: 查:通过节点找寻父节点,一直向上查找直到根节点,返回根节点,而根节点代表唯一的那棵树: 并:先查找到两个节点所在的树,如果在同一棵树中(即查找…

题意:有F个单词,1 <= F <=60 , 长度<=10^4, 每次可以输入一个字符串,所有包含该字串的单词会形成一个集合. 问最多能形成多少个不同的集合.集合不能为空. 分析:用后缀数组处理.然后首先考虑一个单词形成一个集合的情况,若该单词是其他单词的字串,则该单词显然不会形成一个集合,那么利用后缀数组, 对于每个单词看能否与其他单词有LCP,且LCP 长度为该单词本身长度. 然后就是多个单词形成集合的情况:比较简单的处理方式就是将h数组值相同的下标集中存储,比如h[x] = h[y…

并查集 简单并查集:输入N,代表有编号为1.2.3……N电脑.下标从1开始.初始化为-1.合并后根为负数,负数代表根,其绝对值代表个数. We have a network of computers and a list of bi-directional connections. Each of these connections allows a file transfer from one computer to another. Is it possible to send a file…

04-树5. File Transfer (25) 时间限制 150 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue We have a network of computers and a list of bi-directional connections. Each of these connections allows a file transfer from one computer to another. Is it…

题目地址 https://pta.patest.cn/pta/test/16/exam/4/question/670 5-8 File Transfer   (25分) We have a network of computers and a list of bi-directional connections. Each of these connections allows a file transfer from one computer to another. Is it possibl…

Junk-Mail Filter Time Limit: 15000/8000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 9135    Accepted Submission(s): 2885 Problem Description Recognizing junk mails is a tough task. The method used here consists o…

The Suspects Time Limit: 1000MS   Memory Limit: 20000K Total Submissions: 35206   Accepted: 17097 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. T…

We have a network of computers and a list of bi-directional connections. Each of these connections allows a file transfer from one computer to another. Is it possible to send a file from any computer on the network to any other? Input Specification:…