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#include<bits/stdc++.h>
using namespace std;

vector<int> v;

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int n, m, x = 0, a;
	cin>>n;
	for(int i=1; i<=n; i++)
	{
		if(x >= n) break;
		v.push_back(i);
		x += __builtin_popcount(i);
	}
	m = v.size();
	for(int i=v.size()-1; i>=0; i--) 
	{
		a = __builtin_popcount(v[i]);
		if(x - a >= n)
		{
			x -= a;
			v[i] = -1;
			m--;
		}
	}
	cout<<m<<"\n";
	for(int i=v.size()-1; i>=0; i--) if(v[i] != -1) cout<<v[i]<<" ";
	return 0;
}