public static void staircase(int n) {
        IntStream.range(1, n+1).forEach(i -> {
            printChars((n-i), " ");
            printChars(i, "#"); 
            System.out.println("");
        });
    }
    
    public static void printChars(int count, String c) {
        for (int i = 0; i < count; i ++) {
           System.out.print(c);
        }
    }