Codeforces 454A LittlePonyandCrystalMine program in java

LittlePonyandCrystalMine.java

import java.util.Scanner;

public class LittlePonyandCrystalMine
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int n=z.nextInt();
        StringBuilder sb=new StringBuilder();
        String x[]=new String[n];
        for(int i=1;i<=(n/2)+1;i++)
        {
            sb.setLength(0);
            for(int j=1;j<=n;j++)
            {
                if(i<(n/2)+1)
                {
                    if(i==1){
                        if(j==(n/2)+1){
                            System.out.print("D");
                            sb.append("D");
                        }
                        else {
                            System.out.print("*");
                            sb.append("*");
                        }
                    } else {
                        if(j>=(n/2)+1-(i-1) && j<=(n/2)+1+(i-1)){
                            System.out.print("D");
                            sb.append("D");
                        }
                        else {
                            System.out.print("*");
                            sb.append("*");
                        }
                    }
                    x[i]=sb.toString();
                }
                else
                    System.out.print("D");
            }
            System.out.println();
        }
        for(int k=(n/2);k>0;k--)
            System.out.println(x[k]);
    }
}