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#include <bits/stdc++.h>
using namespace std;
#define X first
#define Y second
#define ii pair<int, int>
#define ll long long


int n, sum;
vector<int> v;
//Autor:    Jakub Wielocha
//          VI LO Radom
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n;
    for(int i = 1;i<=1048576;i++)
    {
        if(sum<n)
            v.push_back(i), sum+=(__builtin_popcount(i));
    }
    bool spr = false;
    for(int i = v.size()-1;i>=0;i--)
        if(sum-(__builtin_popcount(v[i]))==n)
        {
            v[i] = -1;
            spr = true;
            break;
        }
    if(spr)
        cout<<v.size()-1<<"\n";
    else
        cout<<v.size()<<"\n";

    for(int i = v.size()-1;i>=0;i--)
        if(v[i]!=-1)
            cout<<v[i]<<" ";

    return 0;
}