#include <iostream>
using namespace std;

int main() {
	int N, sum = 0;
	cin >> N;
	int a[205];

	for (int i = 1; i <= 205; i++) {

	cin >> a[i];

	if (a[i] == 0) {
	break;
	}

	if (i % 2 != 0 && a[i] != 0) {
	for (int j = 1; j <= a[i]; j++) {

	cout << "0";
	sum++;
	if (sum == N) {
	cout << endl;
	sum = 0;
				}
			}                   
     } else if (i % 2 == 0 && a[i] != 0) {
	for (int k = 1; k <= a[i]; k++) {

	cout << "1";
	sum++;

	if (sum == N) {
	cout << endl;
	sum = 0;
	}
	}
	}

	}

	return 0;
}