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#include<bits/stdc++.h>
using namespace std;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int n;
	cin>>n;
	int k = 1;
	vector<int> res;
	int s = 0;
	while(s < n)
	{
		res.push_back(k);
		s+=__builtin_popcount(k);
		k++;
	}
	reverse(res.begin(), res.end());
	int r = res.size();
	while(s > n)
	{
		for(auto& v : res)
		{
			if(v==-1) continue;
			if(s - __builtin_popcount(v) >= n)
			{
				s-=__builtin_popcount(v);
				v = -1;
				r--;
			}
		}
	}
	cout<<r<<"\n";
	for(auto v : res)
	if(v!=-1)
	cout<<v<<" ";
}