public class Client {
    public static void main(String[] args) {
        /*
         * 0 1 4 2 3
         */
        IntTree t = new IntTree();
        t.print();
        System.out.println(t.contains(0));
        System.out.println(t.contains(10));
    }

    

}

// node -> (list)
// list? (node -> (list))