Created
September 19, 2014 13:42
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Fibonacci
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#include <iostream> | |
#include <cstdio> | |
#include <vector> | |
using namespace std; //爲什麽總是忘!!! | |
typedef vector<int> vec; | |
typedef vector<vec> mat; | |
typedef long long lint; | |
const int M = 10000; | |
//caculate A*B | |
mat martix(mat &A,mat &B) { | |
mat C(A.size(),vec(B[0].size())); | |
for(int i=0;i<A.size();i++){ | |
for (int k=0;k<B.size();k++){ | |
for(int j=0;j<B[0].size();j++){ | |
C[i][j]=(C[i][j]+A[i][k]*B[k][j])%M; | |
} | |
} | |
} | |
return C; | |
} | |
//Caculate A^n | |
mat power(mat A,lint n){ | |
mat B(A.size(),vec(A.size())); | |
for (int i=0;i<A.size();i++){ | |
B[i][i]=1; | |
} | |
while(n>0){//快速冪運算 | |
if (n & 1)B = martix(B,A); | |
A=martix(A,A); | |
n >>= 1; | |
} | |
return B; | |
} | |
lint n; | |
void slove (){ | |
mat A(2,vec(2)); | |
A[0][0]=1;A[0][1]=1; | |
A[1][0]=1;A[1][1]=0; | |
A=power(A,n); | |
printf("%d\n",A[1][0]); | |
} | |
int main (){ | |
cin >> n; | |
slove(); | |
return 0; | |
} |
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