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#include <iostream>

using namespace std;

int main()
{
    int n;
    int d;
    int l;
    int p;
    int c=0;
    int k=0;
    cin >> n;
    int m=0;
    while (m<n)
    {
       k++;
       l=k;
       while (l>0)
       {
           if(l%2==1)
            {
                m++;
            }
            l = l/2;
       }
    }
    if (m>n)
    {
        p=k;
        d = m-n;
        while (c!=d)
        {
            c=0;
            p--;
            l=p;
            while (l>0)
            {
                if(l%2==1)
                {
                    c++;
                }
                l = l/2;
            }
        }
        cout << k-1 << endl;
        for (int i=0;i<k;i++)
        {
            if (i!= k-p)
            {
                cout << k-i << " ";
            }
        }
    }
    else
    {
        cout << k << endl;
        for (int i=0;i<k;i++)
        {
            cout << k-i << " ";
        }
    }

}