isPowerOfTwo

/***
Bismillahir Rahmanir Rahim
 _______
|   __  \           _____
|  |__|  )_______   |   /     ____    ______
|   ____/ \__    \  |  |__   /    \  |      \
|  (        / __  \ |  __ \ /  __  \ |   /\  \
|  |       (____  / |     / \      / |__/  \  )
|__|            \/  |____/   \____/         \/

***/

#include<bits/stdc++.h>

using namespace std;

int isPowerOfTwo(int n)
{
    while(n%2==0)
    {
        n/=2;
    }

    return n;
}

int main()
{
    int n,num;

    while(cin>>n)
    {
        num = isPowerOfTwo(n);

        if(num==1)
        {
            cout<<"YES\n\n";
        }
        else
        {
            cout<<"NO\n\n";
        }
    }

    return 0;
}