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#include <bits/stdc++.h>
using namespace std;
int in[1000005];
signed main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	int s=0;
	for(int i=1;i<=n;i++)
	{
		s+=__builtin_popcount(i);
		in[i]=1;
		if(s>=n) break;
	}
	for(int i=n;i>=1;i--)
		if(in[i]&&s-__builtin_popcount(i)>=n) in[i]=0,s-=__builtin_popcount(i);
	int cnt=0;
	for(int i=n;i>=1;i--) cnt+=in[i];
	cout << cnt << "\n";
	for(int i=n;i>=1;i--)
		if(in[i]) cout << i << " ";
	return 0;
}