题意: 一个KTO被定义为一个特殊的连通块,这个连通块满足一个要求,这个连通块中的最短的边大于 与这个连通相连的不属于这个连通块的边中的最大值. 给出一个图,统计KTO里面的点有多少个.(一个点可以属于多个KTO) 如a中有3个KTO,b中有6个KTO. 思路: 因为题目中给出的n最大为5000,那么相应的边为25000000,数量太大,所以一直卡在如何O(log(m))的计算连通块的数量. 但是看了题解之后,大家都是暴力的,那么以后有暴力思路就写(T)一发暴力好了. 首先把边从大到小排序,对于…

题目传送门 题意:定义$Tour \, Belt$为某张图上的一个满足以下条件的点集:①点集中至少有$2$个点②任意两点互相连通③图上两个端点都在这个点集中的边的权值的最小值严格大于图上只有一个端点在这个点集中的边的权值的最大值.现在给你一张$N$个点,$M$条边的图,请给出这张图上所有$Tour\,Belt$中包含的点数的和.$N \leq 5000 , M \leq \frac{N(N - 1)}{2}$ 虽然这道题没有必要用$Kruskal$重构树来写,但是考%你赛的时候写$Kruskal…

题意:给定 n 个城市,m 个月,表示要在这 n 个城市连续 m 个月开演唱会,然后给定每个月在每个城市开演唱会能获得的利润,然后就是演唱会在不同城市之间调动所要的费用, 问你,怎么安排这 n 个演唱会是最优的. 析:很明显的一个DP题,并且也不难,用dp[i][j] 表示在第 i 个月,在第 j 个城市开演唱会,是最优的.那么状态转移方程也就出来了 dp[i][j] = Max(dp[i][j], dp[i-1][k]-f[k][j]+p[j][i]); 代码如下: #pragma comme…

Sightseeing tour Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9276   Accepted: 3924 Description The city executive board in Lund wants to construct a sightseeing tour by bus in Lund, so that tourists can see every corner of the beauti…

Euler Tour Tree最大的优点就是可以方便的维护子树信息,这点LCT是做不到的.为什么要维护子树信息呢..?我们可以用来做fully dynamic connectivity(online). Euler Tour Tree 维护将树中的边u--v变成u->v,v->u后的Euler Tour. 换根: 因为Euler Tour是一个环,那么我们可以在任意一个k->u的地方切断,然后把这段东西接到最后去,这样就把u变成根了 Link: 先换根,然后添加u->v与v->…

Tour Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 4307   Accepted: 1894 Description John Doe, a skilled pilot, enjoys traveling. While on vacation, he rents a small plane and starts visiting beautiful places. To save money, John must…

UVALive - 4108 SKYLINE Time Limit: 3000MS     64bit IO Format: %lld & %llu Submit Status uDebug Description   The skyline of Singapore as viewed from the Marina Promenade (shown on the left) is one of the iconic scenes of Singapore. Country X would a…

UVALive - 3942 Remember the Word A potentiometer, or potmeter for short, is an electronic device with a variable electric resistance. It has two terminals and some kind of control mechanism (often a dial, a wheel or a slide) with which the resistance…

UVALive - 3942 Remember the Word Neal is very curious about combinatorial problems, and now here comes a problem about words. Know- ing that Ray has a photographic memory and this may not trouble him, Neal gives it to Jiejie. Since Jiejie can’t remem…

题目描述: 1015. Jill's Tour Paths Constraints Time Limit: 1 secs, Memory Limit: 32 MB Description Every year, Jill takes a bicycle tour between two villages. There are different routes she can take between these villages, but she does have an upper limit…