hdoj1021 fibonacci again

int ()
{
    freopen("in.txt", "r", stdin);
    int n;
    while(~scanf("%d", &n))
        if(n % 8 == 2 || n % 8 == 6) printf("yesn");
        else printf("non");
    return 0;
}

错误的代码
#include <iostream>
using namespace std;
const int maxn = 1000000 + 5;
long long fi[maxn];
int main()
{
    freopen("in.txt", "r", stdin);
    int fin = 2;
    int n;
    fi[0] = 7;
    fi[1] = 11;
    while(~scanf("%d", &n))
    {
        if(fin <= n)
        {
            for(int i = fin; i <= n; i++)
                fi[i] = fi[i - 1] + fi[i - 2];
            fin = n;
        }
        if(fi[n] % 3 == 0)
            printf("yesn");
        else
            printf("non");
    }
    return 0;
}
*/