A Simple Math Problem Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4307    Accepted Submission(s): 2586 Problem Description Lele now is thinking about a simple function f(x).If x < 10 f(x) =…

用矩阵表示状态,矩阵乘法的就是状态之间的变换 作一个vector: 要求的就是一个矩阵A,使得上面那个vector乘以A之后变成 解得A= [不知道用逆矩阵能不能直接求出A Ref:http://blog.csdn.net/zjtzyrc/article/details/45287233…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1757 题意不难理解,当x小于10的时候,数列f(x)=x,当x大于等于10的时候f(x) = a0 * f(x-1) + a1 * f(x-2) + a2 * f(x-3) + …… + a9 * f(x-10); 所求的是f(x)取m的模,而x,m,a[0]至a[9]都是输入项 初拿到这道题,最开始想的一般是暴力枚举,通过for循环求出f(x)然后再取模,但是有两个问题,首先f(x)可能特别大,其…

一看正确率这么高,以为是水题可以爽一发,结果是没怎么用过的矩阵快速幂,233 题解链接:点我 #include<iostream> #include<cstring> ; using namespace std; int k,m; struct Matrix{ int map[N][N]; }; Matrix matrix; void Initiate(){ ;i<N;i++){ scanf(][i]); } ;i<N;i++){ ;j<N;j++){ ))mat…

题意: 已知: 当x<10时:f(x)=x 否则:f(x) = a0 * f(x-1) + a1 * f(x-2) + a2 * f(x-3) + --+ a9 * f(x-10); 求:f(x)%m的值. 思路: 矩阵快速幂加速递推. 嗯嗯 // by SiriusRen #include <cstdio> #include <cstring> using namespace std; int cases,k,ans,a[10][10],mod; struct matrix…

A Simple Math Problem Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1838    Accepted Submission(s): 1053 Problem Description Lele now is thinking about a simple function f(x). If x < 10 f(x) =…

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题目链接 Matrix multiplication Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 2143    Accepted Submission(s): 967 Problem Description Given two matrices A and B of size n×n, find the product of t…

这个题目上周对抗赛题目,搞了我好久 对数学这种不是很敏感 其实都不是自己想出来的,看其他的资料和博客的推导 还是有点难度的,反正我是推不出来 通过二项式定理的化简 有两个博客写得比较好 http://972169909-qq-com.iteye.com/blog/1863402 http://www.cppblog.com/Yuan/archive/2010/08/13/123268.html 反正构造好二项式之后,乘N次,就可以得到结果了,因为右边的式子 初始全部是x. #include <i…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=1757 A Simple Math Problem Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6621    Accepted Submission(s): 4071 Problem Description Lele now is thin…