#include <iostream>

using namespace std;

int main()
{
    int i[14] = {1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192};
    int n, k = 0;
    cin >> n;
    for (int t = 0; t <= 13; t++)
    {
        if (n == i[t])
            k++;
    }
    if ( k == 1)
        cout << "YES";
    else
        cout << "NO";
    return 0;
}