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    public Node() {
           
    }
       
    public Node(int id, int team, int score) {
        this.id = id;
        this.team = team;
        this.score = score;
    }
       
    Node next, prev;
}
   
class DoubleLinkedList{
    Node head, tail;
       
    public DoubleLinkedList(){
        head = new Node();
        tail = new Node();
        link(head, tail);
    }
       
    public void link(Node lf, Node rt) {
        lf.next = rt;
        rt.prev = lf;
    }
       
    public void insert(Node node) {
        if (head.next != tail) {
            link(node, head.next);
            link(head, node);
        } else {
            link(node, tail);
            link(head, node);
        }
    }
       
}