View Code of Problem 57

import java.util.Scanner;
 
public class Main 
{
	public static void main(String[] args) 
        {
          Scanner scan=new Scanner(System.in);
          int n=scan.nextInt();
          for(int i=1;i<=n;i++)
          {
            for(int j=n-i;j>=1;j--)
            {
              System.out.print(" ");
            }
            for(int k=1;k<=i;k++)
            {
               System.out.print(k);
            }
            for(int l=i-1;l>=1;l--)
            {
               System.out.print(l);
            }
          }
          for(int i=n-1;i>=1;i--)
          {
            for(int j=1;j<=n-i;j++)
            {
              System.out.print(" ");
            }
            for(int k=1;k<=i;k++)
            {
              System.out.print(k);
            }
            for(int l=i-1;l>=1;l--)
            {
              System.out.print(l);
            }
          }
          System.out.println();
        }
}