Fibonacci Description In the Fibonacci integer sequence, F0 = 0, F1 = 1, and Fn = Fn − 1 + Fn − 2 for n ≥ 2. For example, the first ten terms of the Fibonacci sequence are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, … An alternative formula for the Fibonacci…
题意:求菲波那切数列的第n项. 分析:矩阵快速幂. 右边的矩阵为a0 ,a1,,, 然后求乘一次,就进一位,求第n项,就是矩阵的n次方后,再乘以b矩阵后的第一行的第一列. #include <cstdio> #include <cstring> using namespace std; typedef long long ll; ; ; struct Matrix { int n,m; int a[maxn][maxm]; void clear() { n = m = ; mems…