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#include <bits/stdc++.h>

using namespace std;

#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define ll long long
#define ld long double
ll mod=1000000007;
int inf=1000000007;
ll infl=1000000000000000007;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,s=0,i=1;
    cin>>n;
    for(;;i++)
    {
        s+=__builtin_popcount(i);
        if(s>=n) break;
    }
    vector<int>ans;
    ans.pb(i);
    for(int j=i-1;j>0;j--)
    {
        if(s-__builtin_popcount(j)>=n) s-=__builtin_popcount(j);
        else ans.pb(j);
    }
    cout<<sz(ans)<<endl;
    for(auto x:ans) cout<<x<<" ";
    cout<<endl;

    return 0;
}