#include <iostream>
using namespace std;

int main() {
	int nr,i=1,n;
	nr=1;
	cin>>n;
	cout<<23<<endl;
	while(nr<n){
		cout<<nr<<" ";
		i++;
		nr*=2;
	}
	nr/=2;
	while(i<=23){
		i+=1;
		nr+=1;
		cout<<nr<<" ";
	}
}