class Iterator {
		Node * current;
	public:
		Iterator(): current(head) {}
		Iterator(const Iterator& it) {
			this->current = it.current;
		}
		~Iterator();
		Iterator& operator=(const Iterator& it) {
			current = it.current;
			return *this;
		}
		Iterator& operator++() {
			current = current->next;
			return *this;
		}
		T& operator*() const {
			return current->data;
		}
		//DO OGARNIECIAfriend void swap(Iterator& lhs, Iterator& rhs);

	};