Untitled

#include <iostream>
using namespace std;

int main()
{
    int n, a = 1;
    cin >> n;

    for (int i = 2; i <= 10; i++)
    {
        if (n > 1 && n % i == 0 && n != i)
        {
            a = 0;

        }
    }
    if (a > 0) cout << "YES";
    else cout << "NO";
}