ll_stack.push(30) ll_stack.push(100) ll_stack.push(25) ll_stack.pop() print(ll_stack.peek())''' #build a queue using a linked list #front queue at head #back of queue at tail '''ll_queue = LinkedList() #enqueue ll_queue.append(40) ll_queue.append(49) ll_queue.append(50) #ll_queue.print_list() #front #print(ll_queue.head.data) #dequeue ll_queue.delete_from_head() print(ll_queue.head.data)''' ll_queue = LinkedListQueue() ll_queue.enqueue(6) ll_queue.enqueue(20) ll_queue.enqueue(16) ll_queue.enqueue(5) ll_queue.dequeue() print(ll_queue.front())
