这题和某道最短路题神似.对于任意点对,将他们连边,不如将他们分别沿$x,y$轴方向上点按顺序连起来,这样不仅可能多连通一些点,也花费更低,所以按照最短路那题的连边方式跑一个kruskal就行了. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<cmath> #include<queue> #define dbg(x)…

个人心得:看了题目很明确,最小生成树,但是但是周赛卡住了,因为10W的点若一个一个找出距离很明显内存和时间都炸了, 静下心来,画了下图,仔细一想,任意一个点都只会在她左右俩边选择建立联系,那么我们只要对做表X,Y分别排序然后再构建 距离,然后Kruaskal就OK了. 希望以后思维能够更活跃点,才能不失初望. 题目: There are N towns on a plane. The i-th town is located at the coordinates (xi,yi). There m…

Electrification Plan Time limit: 0.5 secondMemory limit: 64 MB Some country has n cities. The government has decided to electrify all these cities. At first, power stations in k different cities were built. The other cities should be connected with t…

Highways 题目链接: http://acm.hust.edu.cn/vjudge/contest/124434#problem/G Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of public highways. The Flatopian government is aware of this problem an…

Constructing Roads 题目链接: http://acm.hust.edu.cn/vjudge/contest/124434#problem/D Description There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villages can connect to each other. We say two villa…

Building a Space Station 题目链接: http://acm.hust.edu.cn/vjudge/contest/124434#problem/C Description You are a member of the space station engineering team, and are assigned a task in the construction process of the station. You are expected to write a…

Problem Description There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villages can connect to each other. We say two village A and B are connected, if and only if there is a road between A and B…

Highways Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 21628   Accepted: 9970 Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has no public highways. So the traffic is difficult in Flatopia. The Fla…

Problem Description You are a member of the space station engineering team, and are assigned a task in the construction process of the station. You are expected to write a computer program to complete the task. The space station is made up with a num…

主题链接:problemId=203" target="_blank">ZOJ 1203 Swordfish 旗鱼 Swordfish Time Limit: 2 Seconds      Memory Limit: 65536 KB There exists a world within our world A world beneath what we call cyberspace. A world protected by firewalls, password…