![]() The First In First Out (FIFO) rule is used in queues the first item entered is the first item exited. Let’s go further into queues and fundamental queue operations. The individual who joins the queue first receives the first ticket, similar to the queue for tickets outside a movie theatre. The most helpful data structure in programming is a queue. The queue is one of the most used data structures. ![]() You feedback is highly appreciated.In this post, we’ll talk about what a queue is and how it works. Link to the above code on my github profile, Queue using linked list. Space complexity = O(1) since no extra or any auxiliary space is used for the above operations. Time complexity of display operation is O(N) where N = number of elements in the queue, since all the elements of the queue are iterated. O(1), since only the rear and front pointers need to be updated and no iteration is performed over the elements. ![]() Time complexity of enqueue and dequeue operations is constant i.e. QueueUsingLinkedList q = new QueueUsingLinkedList() * method to display all elements of the queue */ * method to remove an element from the queue */ attach the new node at the rear end and update rear pointer * method to add a new element to the queue */ QueueNode class representing a node in the linked list constructor to initialize front and rear pointers To dequeue an element, a node is removed from the front end of the queue.ĭiagrammatic representation: Code implementation:.To enqueue an element, a new node is created and attached to the rear end of the queue. ![]()
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