using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter no of rows: ");

        int r = Convert.ToInt32(Console.ReadLine());

        int count = r;

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

            {

                for(int j=0;j<=r-i;j++)

                {

                    Console.Write(" ");

                }

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

                {

                    Console.Write(k);

                }

                for(int l=i;l>=1;l--)

                {

                    Console.Write(l);

                }           

                Console.Write("\n");        

            }

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

            {

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

                {

                    Console.Write(" ");

                }

                for(int j=1;j<=count;j++)

                {

                    Console.Write(j);

                }

                for(int j=count-1;j>=1;j--)

                {

                    Console.Write(j);

                }

                Console.Write("\n");

                count--;

            }

}

}