题意是有若干个接收器,给出每个接收器的相邻接收器.相邻的接收器不能使用同一信号频道.问所需要的信号频道数. 求该无向图的极大团. #include<iostream> #include<cstring> #include<string> #define maxn 30 using namespace std; int stack[maxn],map[maxn][maxn]; int n,cn,bestn; void dfs(int x){ if (x>n){ be…

Channel Allocation Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 14361   Accepted: 7311 Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that every receiver has a s…

POJ 1129 Channel Allocation Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 14191   Accepted: 7229 Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that every receive…

Channel Allocation Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 13231 Accepted: 6774 Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that every receiver has a stron…

题目链接:poj1129 Channel Allocation 题意:要求相邻中继器必须使用不同的频道,求需要使用的频道的最少数目. 题解:就是求图的色数,这里采用求图的色数的近似有效算法——顺序着色算法(实质是一种贪心策略:在给任何一个顶点着色时,采用其邻接顶点中没有使用的,编号最小的颜色). 注:中继器网络是一个平面图,即图中不存在相交的边. 看讨论后发现这组数据,AC代码没过orz: 6 A:BEF B:AC C:BD D:CEF E:ADF F:ADE 正确答案应该是3 : A(1)B(…

Language: Default Channel Allocation Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 12367   Accepted: 6325 Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that ever…

Channel Allocation Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 20000/10000K (Java/Other) Total Submission(s) : 18   Accepted Submission(s) : 7 Problem Description When a radio station is broadcasting over a very large area, repeaters are u…

POJ 2989 题意:给定一个无向图(节点数小于128)求极大团(不包含在更大的团中)的总数. 对最大团,极大团不熟悉的,建议先阅读最大团搜索问题 ZOJ 1492 再来看本题. 本题数据有限,可以使用dfs解决.类似于搜索最大团的加强版.有"两个"剪枝需要注意. 在dfs中需要维护两个集合即 Not(已经尝试过搜索极大团的节点)和Candidate(未曾尝试过的节点)由于极大团带有集合的性质,故某个节点在dfs序列中出现的位次并不重要. 当Not和Can集合同时为空时结束dfs.…

搞懂了什么是团  什么是极大团  什么是最大团 极大团就是  不是任何团的真子集  最大团就是点数最多的极大团 这题就是求极大团的个数 用bk算法 #include <iostream> #include <string> #include <algorithm> #include <map> #include <stack> #include <cstring> #include<cstdio> using namesp…

Channel Allocation Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 13173   Accepted: 6737 Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that every receiver has a s…