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

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