Fiber Communications Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 3804   Accepted: 1160 Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are loc…

Fiber Communications 总时间限制:  1000ms 内存限制:  65536kB 描述 Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are located in a circle around the edge of a large pond, so he can on…

题意 在一个有N(1 ≤ N ≤ 1,000)个点环形图上有P(1 ≤ P ≤ 10,000)对点需要连接.连接只能连接环上相邻的点.问至少需要连接几条边. 思路 突破点在于最后的结果一定不是一个环!所以我们枚举断边,则对于P个连接要求都只有唯一的方法:如果一个pair的两个端点在断点两侧,就分成[0,left],[right,N];否则就是[left, right].这里区间以0开头是要考虑left=1.right=N的情况,至少得有个边([0, 1])表示N连向1的情况不是么. 处理一个区间…

1550: Fiber Communications  Time Limit(Common/Java):1000MS/10000MS     Memory Limit:65536KByteTotal Submit: 3            Accepted:2 Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network…

Fiber Communications Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 4236   Accepted: 1276 Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are loc…

原题地址:http://poj.org/problem?id=1944 题目大意:有n个点排成一圈,可以连接任意两个相邻的点,给出 p 对点,要求这 p 对点必须直接或间接相连,求最少的连接边数 数据范围:n <= 1000, p <= 10000 算法分析: 一开始当最小生成树做的,才发现自己 SB 了…… 先考虑不是环形而是线形的结构,直接贪心连接每两个点之间的所有点就好了.这样我们可以枚举环形的断点,然后逐次贪心,求最小解即可 很多同学在贪心的时候应用了线段树是复杂度高达O(np log…

Description Farmer John wants to connect his N (1 <= N <= 1,000) barns (numbered 1..N) with a new fiber-optic network. However, the barns are located in a circle around the edge of a large pond, so he can only connect pairs of adjacent barns. The ci…

杭电ACM分类: 1001 整数求和 水题1002 C语言实验题——两个数比较 水题1003 1.2.3.4.5... 简单题1004 渊子赛马 排序+贪心的方法归并1005 Hero In Maze 广度搜索1006 Redraiment猜想 数论:容斥定理1007 童年生活二三事 递推题1008 University 简单hash1009 目标柏林 简单模拟题1010 Rails 模拟题(堆栈)1011 Box of Bricks 简单题1012 IMMEDIATE DECODABILITY…

转载:from http://blog.csdn.net/qq_28236309/article/details/47818349 基础题:1000.1001.1004.1005.1008.1012.1013.1014.1017.1019.1021.1028.1029. 1032.1037.1040.1048.1056.1058.1061.1070.1076.1089.1090.1091.1092.1093. 1094.1095.1096.1097.1098.1106.1108.1157.116…

Communication System Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 21631   Accepted: 7689 Description We have received an order from Pizoor Communications Inc. for a special communication system. The system consists of several devices.…