class Node:
    """
    The Node for the Circular Linked List
    """

    def __init__(self, data):
        """
        The Node constructor

        :param data: The node data
        """
        self.data = data
        self.next = None


class CircularLinkedList:

    def __init__(self):
        self.tail = None

    def insert_first(self, data):
        pass

    def insert_last(self, data):
        pass

    def remove_first(self):
        pass

    def remove_last(self):
        pass

    def remove(self, data):
        pass

    def get_size(self):  # O(1)
        pass

    def traverse_list(self):  # O(n)
        pass

