import java.util.Scanner;
public class HollowDiamond {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter total no of rows");
int n = sc.nextInt();
for (int i = 1; i <= n; i++) {
for (int j = i; j < n; j++) {
System.out.print(" ");
}
for (int j = 1; j <= (2 * i - 1); j++) {
if (j == 1 || j == (2 * i - 1)) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
System.out.println();
}
for (int i = n-1; i >=1; i--) {
for (int j = i; j < n; j++) {
System.out.print(" ");
}
for (int j = 1; j <= (2 * i - 1); j++) {
if (j == 1 || j == (2 * i - 1)) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
System.out.println();
}
}
}
