Junk-Mail Filter Time Limit: 15000/8000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 7515 Accepted Submission(s): 2368 Problem Description Recognizing junk mails is a tough task. The method used here consists o
Junk-Mail Filter Time Limit: 15000/8000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6276 Accepted Submission(s): 1981 Problem Description Recognizing junk mails is a tough task. The method used here consists o
Dragon Balls Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4384 Accepted Submission(s): 1673 Problem Description Five hundred years later, the number of dragon balls will increase unexpecte
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2473 给两个操作:M X Y:将X和Y看成一类. S X:将X单独划归成一类. 最后问的是有多少类. 并查集,但是带有删除操作.然而并查集本身不支持删除,网上说可以引入一个id来表示一个点.就好像一个人上网有很多小号一样,假如这个人的小号被封掉并且永久不能解封,还想继续玩下去的话那就重新建一个号,再生成一个id,表示这个id是这个人就好了. 注意在删除操作的时候不能把原来id的pre值重置. /*
D. Connected Components time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output We already know of the large corporation where Polycarpus works as a system administrator. The computer network ther
题目链接 描述 乱世天下,诸侯割据.每个诸侯王都有一片自己的领土.但是不是所有的诸侯王都是安分守己的,实力强大的诸侯国会设法吞并那些实力弱的,让自己的领土面积不断扩大.而实力弱的诸侯王为了不让自己的领土被吞并,他会联合一些其他同样弱小的诸侯国,组成联盟(联盟不止一个),来共同抵抗那些强大的诸侯国. 强大的诸侯国为了瓦解这些联盟,派出了最优秀的间谍来离间他们,使一些诸侯国退出联盟.最开始,每个诸侯国是一个联盟. 有两种操作 1.U x y 表示x和y在同一个联盟.(0≤x,y<n) 2.D x
并查集的介绍可以看下https://www.cnblogs.com/jkzr/p/10290488.html A - Wireless Network POJ - 2236 An earthquake takes place in Southeast Asia. The ACM (Asia Cooperated Medical team) have set up a wireless network with the lap computers, but an unexpected afters
Least Crucial Node 题目链接: http://acm.hust.edu.cn/vjudge/contest/127401#problem/C Description http://7xjob4.com1.z0.glb.clouddn.com/e15d7d11650607e5795d28e1120d7109 Input There are several input lines to a test case. The first line of each test case co