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=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();
                  }
                  
                  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();
                  }
                 
                 
                }
        }