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

int n;
int it,diff;
int *arr;
int *psum;
int res;
vector <int> v;

void preprocess()
{
	cin >> n;
	
	arr = new int [n+1];
	psum = new int [n+1]; psum[0] = 0;
	
	for(int i=1; i<=n; i++) arr[i] = __builtin_popcount(i);
	for(int i=1; i<=n; i++) psum[i] = psum[i-1] + arr[i];
	
	auto x = lower_bound(psum, psum+n, n);
	it = x-psum;
	diff = *x-n;
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	preprocess();
	
	for(int i=it; i>0; i--)
	{
		if(arr[i] <= diff) diff -= arr[i];
		else
		{
			res++;
			v.push_back(i);
		}
	}
	
	cout << res << '\n';
	for(int i=0; i<v.size(); i++) cout << v[i] << " ";
}