#include<iostream>
#include<cstdio>
using namespace std;
#define LL long long

int f[1000005];
int main()
{
    f[0]=1;
    f[1]=2;
    int t=2;
    while(t<1000005)
    {
        f[t]=(f[t-1]+f[t-2])%3;
        t++;
    }
    int n;
    while(scanf("%d",&n)!=EOF)
    {
        if(f[n]==0)
            printf("yes\n");
        else
            printf("no\n");
    }
    return 0;
}