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#include <bits/stdc++.h>

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

using namespace std;

vector<int> bitsum;

int bitnum(int n){
	int ans = 0;
	while(n){
		ans += n%2;
		n /= 2;
	}
	return ans;
}

int main(){
	cin.tie(0);
	ios_base::sync_with_stdio(0);

	int n;
	cin >> n;
	bitsum.resize(n+1);

	int rem = n;

	for(int i = 1; i <= n; i++){
		bitsum[i] = bitsum[i-1] + bitnum(i);
	}

	vector<int> ans;
	for(int i = n; i > 0; i--){
		if (rem > bitsum[i-1]){
			ans.push_back(i);
			rem -= bitnum(i);
		}
	}

	cout << ans.size() << endl;
	for(int i = 0; i < ans.size(); i++){
		cout << ans[i] << " ";
	}
	cout << "\n";

}