求调（玄关）

#include<bits/stdc++.h>
#define int long long
#define endl "\n"
#define jiasu ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define jdsr for(int i=0;i<n;i++)  cin>>a[i];
#define jdsc for(int i=0;i<n;i++)  cout<<a[i]<<" ";
using namespace std;
int n,a[500],s;
signed main(){
//    freopen(".in","r",stdin);
//    freopen(".out","w",stdout);
	jiasu;
	cin>>n;
	for(int i=0;i<n*n;i++){
		cin>>a[i];
	}
	for(int i=0;i<n*n;i++){
		if(i%2==0){
			for(int j=1;j<=a[i];j++){
				if(s%n==0){
					cout<<endl;
				}
				cout<<0;
				s++;
			}
		}else{
			for(int j=1;j<=a[i];j++){
				if(s%n==0){
					cout<<endl;
				}
				cout<<1;
				s++;
			}
		}
	}
	return 0;
}