template <typename T>
class CLNode
{
public:
  CLNode(const T& el);
  
  T data;
  CLNode<T> *next;
};

template <typename T>
void CircularList<T>::addToTail(const T& item)
{
  if(tail == nullptr) {
    tail = new CLNode<T>(item);
    tail->next = tail;
  } else {
    CLNode<T> *newNode = new CLNode<T>(item);
    newNode->next = tail->next;
    tail->next = newNode;
    tail = newNode;
  }
}
template <typename T>
void CircularList<T>::removeFromFront() {
  if(tail == nullptr)
    return;
  if(tail->next == tail) {
    delete tail;
    tail = nullptr;
  } else {
    CLNode<T> *toDelete = tail->next;
    tail->next = toDelete->next;
    delete toDelete;
  }
}