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留名 + 代码#include <iostream>
#include <string.h>
using namespace std;
int Fibonacci[2][2]={1,1,1,0};
void matrix_pow(int c[2][2],int n){
int i,j,k;
if(n == 1){
memcpy(c,Fibonacci,4 * sizeof(int));
return;
}
int tmp[2][2];
matrix_pow(tmp,n/2);
for(i = 0;i < 2;i++)
for(j = 0;j < 2;j++){
c[i][j] = 0;
for(k = 0;k < 2;k++)
c[i][j] = (c[i][j] + tmp[i][k] * tmp[k][j]) % 10000;
}
//指数为奇数
if(n & 1){
memcpy(tmp,c,4 * sizeof(int));
for(i = 0;i < 2;i++)
for(j = 0;j < 2;j++){
c[i][j] = 0;
for(k = 0;k < 2;k++)
c[i][j] = (c[i][j] + tmp[i][k] * Fibonacci[k][j]) % 10000;
}
}
}
int main(){
int n;
while(cin>>n && n >= 0){
if(n == 0){
cout<<0<<endl;
continue;
}
if(n == 1 || n == 2){
cout<<1<<endl;
continue;
}
n-=2;
int c[2][2];
matrix_pow(c,n);
cout<<(c[0][0] + c[1][0]) % 10000<<endl;
}
return 0;
}
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