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

const int MAXN = 1e6;

int p[MAXN+5];

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);

	for(int i=1;i<=MAXN;i++)
		p[i] = p[i-1] + __builtin_popcount(i);

	int n;
	cin >> n;

	vector<int> t;
	for(int i=MAXN-1;i>=0;i--)
		if(p[i] < n) {
			t.push_back(i+1);
			n -= __builtin_popcount(i+1);
		}

	cout << t.size() << "\n";
	for(int i : t) cout << i << " ";
	cout << "\n";

	return 0;
}