poj 3070 Fibonacci

http://poj.org/problem?id=3070

有点水呀

#include <iostream>
#include <cstdio>
#include <queue>
#include <cstring>
#include <set>
using namespace std;

const int N=3000;
const int M=10000;
int a1,a2,b1,b2;
int A1,A2,B1,B2;
void func1()
{
    int tempa1,tempa2;
    int tempb1,tempb2;
    tempa1=a1*A1+a2*B1;
    tempa2=a1*A2+a2*B2;
    tempb1=b1*A1+b2*B1;
    tempb2=b1*A2+b2*B2;
    a1=tempa1%M;
    a2=tempa2%M;
    b1=tempb1%M;
    b2=tempb2%M;
}
void func2()
{
    int tempa1,tempa2;
    int tempb1,tempb2;
    tempa1=A1*A1+A2*B1;
    tempa2=A1*A2+A2*B2;
    tempb1=B1*A1+B2*B1;
    tempb2=B1*A2+B2*B2;
    A1=tempa1%M;
    A2=tempa2%M;
    B1=tempb1%M;
    B2=tempb2%M;
}
int main()
{
    //freopen("data.txt","r",stdin);
    int n;
    while(scanf("%d",&n)!=EOF)
    {
        //cout<<n<<endl;
        if(n==-1)
        break;
        if(n==0)
        {
            printf("0\n");
            continue;
        }
        a1=1;a2=1;b1=1;b2=0;
        A1=1;A2=1;B1=1;B2=0;
        --n;
        while(n)
        {
            if(n&1)
            func1();
            func2();
            n=n>>1;
        }
        printf("%d\n",a2);
    }
    return 0;
}