import java.util.*;
public class PrintSandGlass {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter no of rows");
int n = sc.nextInt();
for (int i = 0; i < n; i++) {
for (int j = 0; j < i; j++) {
System.out.print(" ");
}
for (int j = 0; j < n - i; j++) {
System.out.print("*" + " ");
}
System.out.println();
}
for (int i = n - 1; i >= 0; i--) {
for (int j = 0; j < i; j++) {
System.out.print(" ");
}
for (int j = 0; j < n - i; j++) {
System.out.print("*" + " ");
}
System.out.println();
}
}
}
