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#include <bits/stdc++.h>
using namespace std;
int pref[1000003];
vector<int>V;
int main()
{
    int n,sum=0,ind;
    cin>>n;
    pref[0]=-1;
    for(int i=1;sum<=n;i++)
    {
        sum+=__builtin_popcount(i);
        pref[i]=sum;
        ind=i;
    }
    for(int i=ind;i>=1;i--)
    {
        if(n==0)break;
        if(pref[i]>=n&&pref[i-1]<n)
        {
            n-=__builtin_popcount(i);
            V.push_back(i);
        }
    }
    cout<<V.size()<<"\n";
    for(int i=0;i<V.size();i++)
    {
        cout<<V[i]<<" ";
    }
    return 0;
}