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#include <iostream>
using namespace std;

int OnBitsAmount(int n) {
	int amount = 0;
	while (n) {
		amount += n & 1;
		n >>= 1;
	}
	return amount;
}

int main() {
	int n;
	cin >> n;
	int sum = 0;
	int skippedNum = 0;
	int maxOnesNum = 0;
	int startNum = 0;
	for (int i = 1; i <= n; i++) {
		sum += OnBitsAmount(i);
		maxOnesNum = max(OnBitsAmount(i), maxOnesNum);
		if (sum >= n) {
			startNum = i;
			break;
		}
	}
	if (sum >= n - maxOnesNum) {
		for (int j = startNum; j >= 1; j--) {
			if (OnBitsAmount(j) == sum - n) {
				skippedNum = j;
				goto end;
			}
		}
	}
end:
	if (skippedNum != 0) {
		cout << startNum - 1 << endl;
		for (int i = startNum; i >= 1; i--) {
			if (i != skippedNum)
				cout << i << " ";
		}
	}
	else {
		cout << startNum << endl;
		for (int i = startNum; i >= 1; i--)
			cout << i << " ";
	}
	return 0;
}