Tree

import java.util.Scanner;

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

        int n = Integer.parseInt(scanner.nextLine());

        String firstRow = repeatStr(" ", n + 1)
                + "|"
                + repeatStr(" ", n + 1);
        System.out.println(firstRow);

        for (int i = 0; i < n ; i++) {
            String middle = repeatStr(" ", n - 1 - i)
                    + repeatStr("*", 1 + i)
                    + " | "
                    + repeatStr("*", 1 + i)
                    + repeatStr(" ", n - 1 - i);
            System.out.println(middle);
        }

    }
    static String repeatStr (String text,int count){
            StringBuilder result = new StringBuilder();

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

                result.append(text);
            }
            return result.toString();
        }
}