Rombus

import java.util.Scanner;

public class rombus {

    static String repeatStr(String strToRepeat, int count) {
        String text = "";

        for (int i = 0; i < count; i++) {
            text = text + strToRepeat;
        }

        return text;
    }


    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());


        for (int i = 1; i <= n; i++) {
            System.out.print(repeatStr(" ", n - i));

            System.out.println(repeatStr("* ", i));
        }
        for (int i = n - 1; i >= 1; i--) {
            System.out.print(repeatStr(" ", n - i));

            System.out.println(repeatStr("* ", i));
        }
    }
}