#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int n;
vector <int> sol;

int main()
{
	int now;
	cin >> n;
	now = 1;
	while(now <= n)
	{
		sol.push_back(now);
		now = (now << 1);
	}
	cout << sol.size() << "\n";
	for(int i = 0; i < sol.size(); ++i)
		cout << sol[i] << ' ';
	cout << "\n";
	return 0;
}