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#include <vector>
#include <iostream>

int countBits(int x) {
	int count = 0;
	while (x) {
		count += x & 1;
		x >>= 1;
	}
	return count;
}

int main() {
	int n;
	std::cin >> n;
	int currentSum = 0;
	for (int i = 1; i <= 1'000'000; ++i) {
		currentSum += countBits(i);
	}
	std::vector<int> out;
	for (int i = 1'000'000; i > 0; --i)
	{
		if ((currentSum - countBits(i)) >= n) {
			currentSum -= countBits(i);
			continue;
		}
		out.push_back(i);
		currentSum -= countBits(i);
		n -= countBits(i);
	}
	std::cout << out.size() << std::endl;
	for (auto i : out)
		std::cout << i << " ";
}