#include<stdio.h>
#include<string.h>
#define _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_DEPRECATE
#pragma warning(disable:4996)
int box[100000];
int main()
{   
	int n;
	int length;
	int sum = 0;
	int S = 0;
	scanf("%d", &n);

	int i = 1;
	while(1)
	{
		scanf("%d", &box[i]);
		S += box[i];
		i++;
		if (S == n * n)
			break;
	}

	length = sizeof(box);

	for (int i = 1; i <= length; i++)
	{
		for (int j = 1; j <= box[i]; j++)
		{
			if (i % 2 == 1)
				printf("0");
			if (i % 2 == 0)
				printf("1");
			sum++;//当字符数达到n的时候换行
			if (sum % n == 0)
				printf("\n");
		}

	}
		
	return 0;
}