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Given a n × n matrix A and a positive integer k, find the sum S = A + A2 + A3 + … + Ak. Input The input contains exactly one test case. The first line of input contains three positive integers

Little Q wants to buy a necklace for his girlfriend. Necklaces are single strings composed of multiple red and blue beads. Little Q desperately wants to impress his girlfriend, he knows that she will

A sequence S n is defined as:  Where a, b, n, m are positive integers.┌x┐is the ceil of x. For example, ┌3.14┐=4. You are to calculate S n.  　　You, a top coder, say: So easy!  Input　　Ther

Function Fx,yFx,ysatisfies:  For given integers N and M,calculate Fm,1Fm,1 modulo 1e9+7.  InputThere is one integer T in the first line.  The next T lines,each line includes two integers

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传送门 题意： #include using namespace std; typedef long long LL; const int N = 3; const int MOD = 1e9+7; LL quickpow(LL m,LL n) { LL b=1; m%=MOD; while(n>0) { if(