#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a,b[40000];
	cin>>n;
	int s=0,s1=0,s2=0;
	while(s<=n*n){
	cin>>a;
	s+=a;
	s1++;
	for(int j=1;j<=a;j++){
		if(s2==n){
			cout<<endl;
			s2=0;
		}
		if(s1%2==1){
			cout<<'0';
		}
		else cout<<'1';
		s2++;
		}	
	}
	
}```