#include<iostream>
using namespace std;

int main()
{
    int N;
    cin >> N;
 
    int a,b;
    int s = 0;
    while(s != N*N)
    {
        cin >> a >> b;
        int i = 0;
        for(i = 0;i < a;i++)
        {
            cout << 0;
            s++;
            if(s%N==0)
            {
                cout << endl;
            }
        }
        for(i = 0;i < b;i++)
        {
            cout << 1;
            s++;
            if(s%N==0)
            {
                cout << endl;
            }
        }
    }
    return 0;
}