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…

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 &…

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…

题目地址:http://poj.org/problem?id=1419 Graph Coloring Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4468   Accepted: 2042   Special Judge Description You are to write a program that tries to find an optimal coloring for a given graph. Col…

                                                           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…

http://poj.org/problem?id=1419 (题目链接) 题意 求一般图最大独立集. Solution 最大独立集=补图的最大团. 代码 // poj1419 #include<algorithm> #include<iostream> #include<cstring> #include<cstdlib> #include<cstdio> #include<cmath> #include<queue>…

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…

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…

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…

    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…