{}
import java.util.*;
class Pattern{
public static void main(String[] args){
Scanner sc =new Scanner(System.in);
System.out.println("enter no. of row=");
int n=sc.nextInt();
for(int i=1; i<=n; i++){
for(int j=1; j<=n-i; j++){
System.out.print(" "+" ");
}
for(int j=1; j<=n; j++){
if(i==1|| j==1||i==n ||j==n)
System.out.print("*"+" ");
else
System.out.print(" "+" ");
}
System.out.println();
}
}
}