Write a method printLevel() that takes a Node as argument and prints the keys in the subtree rooted at that node in level order (in order of their distance from the root, with nodes on each level in order from left to right).
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Write a method printLevel() that takes a Node as argument and prints the keys in the subtree rooted at that node in level order (in order of their distance from the root, with nodes on each level in order from left to right). Hint : Use a Queue.
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- IN JAVA: Use a singly-linked circular node class to implement the list. Refer to the illustration below:IN JAVA: Use a doubly-linked circular node class to implement the list. Refer to the illustration below.Add more methods to the singly linked list class then test them• search(e) // Return one node with 3 values (stuID, stuName, stuScore) which matches agiven key e (studentID).• addAfter(e, stuID, stuName, stuScore) //Add a new node with 3 values (stuID,stuName, stuScore) after the node with the key e (studentID).• removeAt(e) //Remove a node which matches a given key e (studentID)• count() //Return a number of nodes of list.• update(stuID, stuName, stuScore) //Update the values of one node three codes below two in pictures one,typed out. public class SlinkedList<A,B,C> { private Node head; private Node tail; private int size; public SlinkedList(){ head=null; tail=null; size=0; } public int getSize(){ return size; } public boolean isEmpty(){ return size == 0; } public A getFirstStuId(){ if(isEmpty()) return null; return (A) head.getStuID();}public B getFirstStuName(){ if(isEmpty())…
- 8. Write down the insertBefore method which inserts a new element in the list before the node containing the given element. The method takes as parameters a dummy headed doubly linked circular list, the element existing in the list and new element to be added. public void insertBefore (Node head, Object elem, Object newElement) { //to do OR def insertBefore (head, elem, newElement): pass insertBefore (head, 3, 50) Sample Input Sample Output Ox21 2 223 240 O x21 2 22 50 ² 3 2 4 0Add more methods to the singly linked list class then test them• search(e) // Return one node with 3 values (stuID, stuName, stuScore) which matches agiven key e (studentID).• addAfter(e, stuID, stuName, stuScore) //Add a new node with 3 values (stuID,stuName, stuScore) after the node with the key e (studentID).• removeAt(e) //Remove a node which matches a given key e (studentID)• count() //Return a number of nodes of list.• update(stuID, stuName, stuScore) //Update the values of one node public class SlinkedList<A,B,C> { private Node head; private Node tail; private int size; public SlinkedList(){ head=null; tail=null; size=0; } public int getSize(){ return size; } public boolean isEmpty(){ return size == 0; } public A getFirstStuId(){ if(isEmpty()) return null; return (A) head.getStuID();}public B getFirstStuName(){ if(isEmpty()) return null; return (B)…Java help, can you please explain this I'm a beginner and I'm lost:( Implement a nested class DoubleNode for building doubly-linked lists, where each node containsa reference to the item preceding it and the item following it in the list (null if there is no suchitem). Then implement methods for the following tasks:• Print the contents of the list• Insert at the beginning• Insert at the end• Remove from the beginning• Remove from the end• Insert before a give node (Insert before the first occurrence of the node, if thenode exists; else insert at the end)• Insert after a given node (Insert after the first occurrence of the node, if the nodeexists; else insert at the end)• Remove a given node (Remove the first occurrence of the node, remove nothing ifnode not found)• Move to front (move the first occurrence of the node to the front)• Move to end (moved and first occurrence of the node to the end)Write a tester program and test your implementation. You must test each of these cases…
- Implement a double-ended queue. It is a variation where enqueues and dequeues are allowed on both ends. Implement the following double-ended queue operations using circular array representation with variables for the front and rear indices: a. new b. clear c. enqueueFront d. enqueueRear e. dequeueFront f. dequeueRear g. isEmpty h. isFull i. peekimplement this method: numOccurrencesRec(LNode node, int n, int key) – This method takes as parameters a reference to the head of a linked list, a position specified by n, and a key. It returns the number of occurrences of the key in the linked list beginning at the n-th node. If n = 0, it means you should search in the entire linked list. If n = 1, then you should skip the first node in the list.Complete the method in java or python below that takes the reference of a non-dummy headed singly linear linked list and removes all the nodes containing multiples of 5 from the list. remove_multiple_of_five(head) Sample Input Sample Output 5 → 6 → 35 → 10 → 12 → 90 6 →12 11 → 21 → 3 → 43 → 51 11 → 21 → 3 → 43 → 51 10 → 20 → 30 → 40 → 50 null
- The program BinaryTreeTest.java prints the nodes by inorder traversal. Please add two methods printPreOrder(Node node) and printPostOrder(Node node) in the program and print the numbers by the two orders. Then please add findMax(Node node)and findMin(Node node) to find the maximal and minimal numbers respectively for the tree. Hint: to implement findMax(Node node), a recursive method is needed. If the node is empty. return 0. If the node's right sub-tree is null, return the node's value. Otherwise call findMax() recursively using the right child as the parameter. findMin(Node node) is similar, but you will focus on left child.Add more methods to the doubly linked list class then test them• search(e) // Return one node with 3 values (stuID, stuName, stuScore) which matches agiven key e (studentID).• addAfter(e, stuID, stuName, stuScore) //Add a new node with 3 values (stuID,stuName, stuScore) after the node with the key e (studentID).• removeAt(e) //Remove a node which matches a given key e (studentID)• count() //Return a number of nodes of list.• update(stuID, stuName, stuScore) //Update the values of one node first code below package DlinkedList;public class DLinkedList<A,B,C> { private Node<A,B,C> header; private Node<A,B,C> trailer; private int size; public DLinkedList() { header = new Node<>(null, null, null); trailer = new Node<>(null, null, null); header.setNext(trailer); trailer.setPrev(header); } public int getSize() { return size; } public boolean isEmpty() { return size==0; } public A…Add more methods to the doubly linked list class then test them• search(e) // Return one node with 3 values (stuID, stuName, stuScore) which matches agiven key e (studentID).• addAfter(e, stuID, stuName, stuScore) //Add a new node with 3 values (stuID,stuName, stuScore) after the node with the key e (studentID).• removeAt(e) //Remove a node which matches a given key e (studentID)• count() //Return a number of nodes of list.• update(stuID, stuName, stuScore) //Update the values of one node two codes below package DlinkedList; class Node<A,B,C> { private A stuID; private B stuName; private C stuScore; private Node<A,B,C> next; private Node <A,B,C> prev; public Node(A id, B name, C score) { stuID = id; stuName = name; stuScore = score; next = null; prev = null; } public A getStuID() { return stuID; } public B getStuName() { return stuName; } public C getStuScore() { return stuScore; } public Node<A,B,C> getNext(){ return next; } public Node<A,B,C>…