#include <cstdio>
using namespace std;
const int MAXN=1000005;
int f[MAXN];
int main()
{
    f[0]=7%3;
    f[1]=11%3;
    for(int i=2;i<1000000;i++)
    {
        f[i]=(f[i-1]+f[i-2])%3;
    }
    int n;
    while(scanf("%d",&n)!=EOF)
    {
        if(f[n]==0)
        {
            printf("yes\n");
        }
        else
        {
            printf("no\n");
        }
    }
    return 0;
}