import java.util.*;
public class main
{
    public static void main(String[] args)
    {
        Scanner scan=new Scanner(System.in);
        if(n<=0)
        {
            System.out.println("Invalid input");
        }
        int n=scan.nextInt();
        int[][] arr=new int[n][n];
        for(int i=0;i<arr.length;i++)
        {
            for(int j=0;j<arr.length;j++)
            {
                if((i+j)%2==0)
                {
                    System.out.print("1 ");
                }
                else
                {
                    System.out.print("0 ");
                }
            }
            System.out.println();
        }
    }
}