---

#include<iostream>
#include<string>
using namespace std;
int num_f(int n, const string& f)
{
	int num = 0;
	if (f.length() < (1 << n))
	{
		cout << "Error! Invalid vector" << endl;
		return -1;
	}
	for (int i = 0; i < f.length(); i++)
	{
		if (f[i] != '0')
			num += (1 << (f.length() - i - 1));
	}
	cout << num << endl;
}
int sets_of_one(int n, const string& f)
{
	if (f.length() < (1 << n))
	{
		cout << "Error! Invalid vector" << endl;
		return -1;
	}
	for (int i = 0; i < f.length(); i++)
	{
		if (f[i] != '0')
		{
			string result = "";
			for (int j = n - 1; j >= 0; --j)
			{
				if ((i >> j) & 1)
					result += "1";
				else
					result += "0";
			}
			cout << result << endl;
		}
	}
}
int main()
{
	int n;
	cin >> n;
	string f;
	cin.ignore();
	cin.ignore();
	getline(cin, f);
	num_f(n, f);
	sets_of_one(n, f);
}