using System;

public class Program

{

    public static void Main()

    {

          int n;

            Console.WriteLine("Nhap n:");

            n = int.Parse(Console.ReadLine());

            for (int i = 1; i <= n; i++)

            {   

                Console.Write("".PadLeft((n-i)*2));

                for (int j = 0, k = i; j < i * 2 - 1; j++)

                {

                    Console.Write(k%10+" ");

                    if (j >= (i * 2 - 1) / 2) k -= 1;

                    else k += 1;                  

                }

                Console.WriteLine();

            }

    }

}