题目链接 考虑建立原图的补图,即如果两个骑士不互相憎恨,就在他们之间连一条无向边. 显而易见的是,如果若干个骑士在同一个点数为奇数的环上时,他们就可以在一起开会.换句话说,如果一个骑士被一个奇环包含,那么他就一定可以去开会. 想到环,我们就可以考虑无向图的双联通分量. 当我们用Tarjan算法求出无向图上的双联通分量后再来考虑这一道题时,我们就可以得出两个结论: 1.如果两个骑士分别在两个不同的双联通分量里,那么他们就不可能在一起开会. 这一个结论是很明显的.因为将每个双联通分量缩点后,新图一定…

POJ2942 洛谷UVA1364(博主没有翻墙uva实在是太慢了) 以骑士为结点建立无向图,两个骑士间存在边表示两个骑士可以相邻(用邻接矩阵存图,初始化全为1,读入一对憎恨关系就删去一条边即可),则题意变为求图中不在任何奇环(结点数为奇数的环)中的点的数量. 一个环上的点一定属于一个双连通分量(两两都有两条路径可达) 那么什么时候双连通分量中没有奇环呢? 显然,当双连通分量是二分图的时候,图中没有奇环,因为从一个点出发回到该点一定要经过偶数条边. 即非二分图的双连通分量一定含有奇环 那么,非二…

问题 E: Knights of the Round Table 时间限制: 1 Sec  内存限制: 256 MB 题面 题目描述 作为一名骑士是一个非常有吸引力的职业:寻找圣杯,拯救遇难的少女,与其他骑士一起喝酒是有趣的事情.因此,近年来亚瑟王国经历了骑士人数空前增加,这并不奇怪.现在有这么多骑士,每个圆桌骑士都可以同时来到卡米洛特并坐在圆桌旁;通常只有一小群骑士在那里,而其他人则忙于在全国各地做英雄事迹. 在讨论中,骑士很容易过度兴奋 - 特别是在喝了几杯酒之后.在发生一些不幸的事故之后,…

Knights of the Round Table Time Limit: 7000MS   Memory Limit: 65536K Total Submissions: 12439   Accepted: 4126 Description Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, and drinking with the oth…

Knights of the Round Table Time Limit: 7000MS   Memory Limit: 65536K Total Submissions: 10911   Accepted: 3587 Description Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, and drinking with the oth…

Knights of the Round Table Time Limit: 7000MS   Memory Limit: 65536K Total Submissions: 9169   Accepted: 2960 Description Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, and drinking with the othe…

Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, anddrinking with the other knights are fun things to do. Therefore, it is not very surprising that in recentyears the kingdom of King Arthur has exp…

Description Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, and drinking with the other knights are fun things to do. Therefore, it is not very surprising that in recent years the kingdom of King…

Problem  UVALive - 3523 - Knights of the Round Table Time Limit: 4500 mSec Problem Description Input The input contains several blocks of test cases. Each case begins with a line containing two integers 1 ≤ n ≤ 1000 and 1 ≤ m ≤ 1000000. The number n…

Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, and drinking with the other knights are fun things to do. Therefore, it is not very surprising that in recent years the kingdom of King Arthur has e…