pattern18.java

import java.util.*;

public class pattern18{

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

     // write ur code here
    int n = scn.nextInt();
    int sp = 0;
    int st = n;
    
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=sp;j++){
            System.out.print("\t");
        }
        for(int j = 1;j<=st;j++){
            if(i > 1 && i <= n/2 && j > 1 && j < st){
                System.out.print("\t");
            }else{
                System.out.print("*\t");
            }
        }
        if(i <= n/2 ){
            sp++;
            st-=2;
        }else{
            st+=2;
            sp--;
        }
        System.out.println();   
        
    }
 }
}


/*

input = 7;

output : 

*	*	*	*	*	*	*	
	*				*	
		*		*	
			*	
		*	*	*	
	*	*	*	*	*	
*	*	*	*	*	*	*	

*/