HDU 1021——Fibonacci Again

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

int F[1000005];

void init(){
    F[0]=7%3;
    F[1]=11%3;
    F[2]=0;
    for(int i=3;i<=1000000;++i){
        F[i]=(F[i-1]+F[i-2])%3;
    }
}

int main(){
    init();
 //   freopen("data.txt","r",stdin);
    int n;
    while(scanf("%d",&n)!=EOF){
   //     cout<<F
<<' '<<n<<endl;
        if(F
)printf("no\n");
        else printf("yes\n");
    }
    return 0;
}