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

typedef vector<int> vi;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	vi res, nums;
	int sum = 0, x = 1;
	while (sum < n) {
		nums.push_back(x);
		sum += __builtin_popcount(x);
		x++;
	}
	for (int i = nums.size() - 1; i >= 0; i--) {
		if (sum - __builtin_popcount(nums[i]) >= n)
			sum -= __builtin_popcount(nums[i]);
		else
			res.push_back(nums[i]);
	}
	cout << res.size() << '\n';
	for (auto r : res) cout << r << ' ';
	cout << '\n';
	return 0;
}