//c++
#include <iostream>
using namespace std;
signed main()
{
int n, i = 1;
cin >> n;
while (i < n)
i = i * 2;
if (i == n)
cout << "YES";
else
cout << "NO";
return 0;
}
//c++
#include <iostream>
using namespace std;
signed main()
{
int n, i = 1;
cin >> n;
while (i < n)
i = i * 2;
if (i == n)
cout << "YES";
else
cout << "NO";
return 0;
}