意甲冠军: 给你一幅这样子生成的图,求最小生成树的边权和. 思路:对于i >= 6的点连回去的5条边,打表知907^53 mod 2333333 = 1,所以x的循环节长度为54,所以9个点为一个循环,接下来的9个点连回去的边都是一样的. 预处理出5个点的全部连通状态.总共仅仅有52种,然后对于新添加一个点和前面点的连边状态能够处理出全部状态的转移. 然后转移矩阵能够处理出来了,高速幂一下就能够了,对于普通的矩阵乘法是sigma( a(i, k) * b(k, j) ) (1<=k<=N…

HDU 1588 Gauss Fibonacci(矩阵高速幂+二分等比序列求和) ACM 题目地址:HDU 1588 Gauss Fibonacci 题意:  g(i)=k*i+b;i为变量.  给出k,b,n,M,问( f(g(0)) + f(g(1)) + ... + f(g(n)) ) % M的值. 分析:  把斐波那契的矩阵带进去,会发现这个是个等比序列. 推倒: S(g(i)) = F(b) + F(b+k) + F(b+2k) + .... + F(b+nk) // 设 A = {1…

pid=2243" target="_blank" style="">题目链接:hdu 2243 考研路茫茫--单词情结 题目大意:略. 解题思路:和poj 2778 DNA Sequence类似的做法.不同的是这道题目是要求小于长度L的,所以要多加一个维护总 和,做过矩阵高速幂的人肯定都会这个. 然后我们肯定是先算出不包括词根的.用总的减掉就是要求的答案,所以我又 加了两个用来维护总的,长度为i时,总的可能串有26i,累加. 题目要求取模264,直…

职务地址:HDU 2842 这个游戏是一个九连环的游戏. 如果当前要卸下前n个环.由于要满足前n-2个都卸下,所以要先把前n-2个卸下.须要f(n-2)次.然后把第n个卸下须要1次,然后这时候要卸下第n-1个.然后此时前n-2个都已经被卸下了.这时候把前n-2个都卸下与都装上所需的次数是一样的.由于卸下与装上的规则是一样的. 所以又须要f(n-2)次.这时候前n-1个都在上面,卸下前n-1个须要f(n-1)次. 所以.总共须要2*f(n-2)+f(n-1)+1次. 然后构造例如以下矩阵. 1,2…

Minimum Spanning Tree Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) [Problem Description] XXX is very interested in algorithm. After learning the Prim algorithm and Kruskal algorithm of minimum spanning tree, XXX…

题目地址:HDU 2256 思路: (sqrt(2)+sqrt(3))^2*n=(5+2*sqrt(6))^n; 这时要注意到(5+2*sqrt(6))^n总能够表示成an+bn*sqrt(6); an+bn*(sqrt(6))=(5+2*sqrt(6))*(a(n-1)+b(n-1)*sqrt(6)) =(5*a(n-1)+12*b(n-1))+(2*a(n-1)+5*b(n-1))*sqrt(6); 显然,an=5*a(n-1)+12*b(n-1);bn=2*a(n-1)+5*b(n-1);…

Problem Description XXX is very interested in algorithm. After learning the Prim algorithm and Kruskal algorithm of minimum spanning tree, XXX finds that there might be multiple solutions. Given an undirected weighted graph with n (1<=n<=100) vertex…

Problem Description Consider a Depth-First-Search(DFS) spanning tree T of a undirected connected graph G, we define a T-Simple Circle as a path v1, v2, ..., vk (v1 = vk) in G that contains at most one edge which not belongs to the DFS spanning tree T…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2489 Problem Description For a tree, which nodes and edges are all weighted, the ratio of it is calculated according to the following equation. Given a complete graph of n nodes with all nodes and edges…

Training little cats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 9613   Accepted: 2296 Description Facer's pet cat just gave birth to a brood of little cats. Having considered the health of those lovely cats, Facer decides to make th…