Yet another Number Sequence Let’s define another number sequence, given by the following function:f(0) = af(1) = bf(n) = f(n − 1) + f(n − 2), n > 1When a = 0 and b = 1, this sequence gives the Fibonacci Sequence. Changing the values…

#include <iostream> #include <cstdio> #include <cstring> #include <algorithm> using namespace std; typedef long long ll; const int N = 4; int Mod; int msize; struct Mat { int mat[N][N]; }; Mat operator *(Mat a, Mat b) { Mat c; mems…

题目大意:已知递推公式和边缘值,求某项的最后m(0<m<5)位数字. 题目分析:矩阵二分幂的模板题. 代码如下: # include<iostream> # include<cstdio> # include<cstring> # include<algorithm> using namespace std; struct matrix { ][]; matrix(int _r,int _c):r(_r),c(_c){} }; int a,b,n…

典型的两道矩阵快速幂求斐波那契数列 POJ 那是 默认a=0,b=1 UVA 一般情况是 斐波那契f(n)=(n-1)次幂情况下的(ans.m[0][0] * b + ans.m[0][1] * a): //POJ #include <cstdio> #include <iostream> using namespace std; ; struct matrix { ][]; }ans, base; matrix multi(matrix a, matrix b) { matrix…

题意:已知f(0) = a,f(1) = b,f(n) = f(n − 1) + f(n − 2), n > 1,求f(n)的后m位数. 分析:n最大为109,矩阵快速幂求解,复杂度log2(109). #include<cstdio> #include<cstring> #include<cstdlib> #include<cctype> #include<cmath> #include<iostream> #include&…

简单矩阵快速幂. if(m==1) MOD=10; if(m==2) MOD=100; if(m==3) MOD=1000; if(m==4) MOD=10000; 剩下的就是矩阵快速幂求斐波那契数列第n项取模 #include<cstdio> #include<cstring> #include<cmath> #include<vector> #include<algorithm> using namespace std; long long…

Description Everyone knows what the Fibonacci sequence is. This sequence can be defined by the recurrence relation: F1 = 1, F2 = 2, Fi = Fi - 1 + Fi - 2 (i > 2). We'll define a new number sequence Ai(k) by the formula: Ai(k) = Fi × ik (i ≥ 1). In thi…

Problem Description A number sequence is defined as follows: f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7. Given A, B, and n, you are to calculate the value of f(n).   Input The input consists of multiple test cases. Each test case…

HDU - 1005 Number Sequence Problem Description A number sequence is defined as follows:f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7.Given A, B, and n, you are to calculate the value of f(n). Input The input consists of multiple test…

A number sequence is defined as follows:  f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7.  Given A, B, and n, you are to calculate the value of f(n). Input The input consists of multiple test cases. Each test case contains 3 integers…