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#include <iostream>

using namespace std;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	int sum = 0;
	int it = 1;
	while(sum < n) {
		sum += __builtin_popcount(it++);
	}
	it--;
	if (sum == n) cout << it << "\n";
	else cout << it - 1 << "\n";
	for(int i = it; i > 0; i--) {
		if (__builtin_popcount(i) == sum - n) {
			sum = n;
			continue;
		}
		cout << i << " ";
	}
}