#include<stdio.h>
int main() {
	int n,i=0,s=0,a, num[10000];
	char ch;
	scanf_s("%d", &n);
	while (scanf_s("%d",&a)) {
		num[i++] = a;
		if ((ch = getchar()) == '\n') break;
	}
	for (int j = 0; j < i; j++) {
		if (j % 2 == 0) {
			for (int k = 1; k <= num[j] ; k++) {
				if (s % n == 0&&s!=0) printf("\n");
				s++;
				printf("0");
			}
		}
		else {
			for (int k = 1; k <= num[j]; k++) {
				if (s % n == 0 && s != 0) printf("\n");
				s++;
				printf("1");
			}
		}
	}
	return 0;
}