Graph Coloring Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4926   Accepted: 2289   Special Judge Description You are to write a program that tries to find an optimal coloring…

嘟嘟嘟 求无向图的最大独立集. 有这么一回事:最大独立集=补图的最大团. 所谓的最大团,就是一个子图,满足图中任意两点都有边. 然后ssy巨佬告诉了我一个很没有道理强的做法:随机. 每一次random_shuffle储存节点的数组,然后从头开始扫每一个点,能加入最大团就加入,否则continue. 最后看看是不是比当前答案优. 一直随机,直到一秒. 我也不知道这有什么道理,但就是过了. .p.s:poj太慢了,得随机到0.3秒(竟然还能过). #include<cstdio> #include…

最大独立集: 顶点集V中取 K个顶点,其两两间无连接. 最大团: 顶点集V中取 K个顶点,其两两间有边连接. 最大独立集=补图的最大团最大团=补图的最大独立集 #include<iostream> #include<cstring> #include<cstdio> using namespace std; ][],mark1[],mark2[]; int n,m; int cnt,maxx; void dfs(int x) { if(x>n) // 如果枚举了所…

Graph Coloring Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4893   Accepted: 2271   Special Judge Description You are to write a program that tries to find an optimal coloring for a given graph. Colors are applied to the nodes of the…

Graph Coloring You are to write a program that tries to find an optimal coloring for a given graph. Colors are applied to the nodes of the graph and the only available colors are black and white. The coloring of the graph is called optimal if a maxim…

主题如以下: Graph Coloring  You are to write a program that tries to find an optimal coloring for agiven graph. Colors are applied to the nodes of the graph and the only availablecolors are black and white. The coloring of the graph is called optimalif a…

Graph Coloring I https://www.nowcoder.com/acm/contest/203/J 题目描述 修修在黑板上画了一些无向连通图,他发现他可以将这些图的结点用两种颜色染色,满足相邻点不同色. 澜澜不服气,在黑板上画了一个三个点的完全图.修修跟澜澜说,这个图我能找到一个简单奇环. 澜澜又在黑板上画了一个n个点m条边的无向连通图.很可惜这不是一道数数题,修修做不出来了. 澜澜非常得意,作为一位毒瘤出题人,有了好题当然要跟大家分享,于是他把这道题出给你做了. 输入描述:…

http://poj.org/problem?id=1419 题意: 一张图黑白染色,相邻点不能都染黑色,最多能染几个黑色点 最大点独立集 但是图不能同构为二分图,不能用二分图匹配来做 那就爆搜吧 还可以转化为补图的最大团问题 #include<cstdio> #include<cstring> #include<iostream> using namespace std; ][]; ],res[]; int n,ans,cnt; void read(int &…

Graph Coloring Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 5775   Accepted: 2678   Special Judge Description You are to write a program that tries to find an optimal coloring for a given graph. Colors are applied to the nodes of the…

    HamaWhite 原创,转载请注明出处!欢迎大家增加Giraph 技术交流群: 228591158     Graph coloring is the problem of assigning a color to each vertex of an undirected graph such that no two adjacent vertices have the same color. We implement the greedy algorithm from Scalabl…