W_patter.java

import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner scn = new Scanner(System.in);

       int n = scn.nextInt();
        for(int i = 1 ; i <= n ; i++)
        {
                for(int j = 1 ; j <= n ; j++)
                {
                    if(j == 1 || j == n)
                    System.out.print("*\t");
                    else{
                        if(i >n/2)
                        {
                            if(j==i||j+i == n+1)
                            System.out.print("*\t");
                            else
                             System.out.print("\t");
                            
                        }else{
                            System.out.print("\t");  
                        }
                    }
                   
                   
                }
             System.out.println();
        }
    }
}