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

int zapalone_bity(int x) {
	int pot = 0;
	while ((1 << pot) < x) pot++;
	if ((1 << pot) == x) return 1;
	int ilosc = 0;
	for (int i = 0; i < pot; i++)
		if (x & (1 << i)) ilosc++;
	return ilosc;
}

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

	int n;
	cin >> n;
	stack<int>numbers;
	int ilosc = 0;
	for (int i = 1; i <= n; i++) {
		ilosc += zapalone_bity(i);
		numbers.push(i);
		if (ilosc >= n) break;
	}

	if (ilosc > n) {
		stack<int>temp;
		while (ilosc - zapalone_bity(numbers.top()) != n) {
			temp.push(numbers.top());
			numbers.pop();
		}

		numbers.pop();

		while (temp.size()) {
			numbers.push(temp.top());
			temp.pop();
		}
	}

	cout << numbers.size() << '\n';
	while (numbers.size()) {
		cout << numbers.top() << ' ';
		numbers.pop();
	}
	cout << '\n';

	return 0;
}