Explanation of Solution
The algorithm to swap two nodes “x” and “y” in singly linked list “L” is given below:
Algorithm:
Input: Two nodes “x” and “y”.
Output: Swap the two nodes in singly linked list “L”.
swapSingly(x, y):
//Create a node to assign the head into it
Node n = head;
/*Loop executes until the next node of head is not equal to "x" node. */
while(n.getNext() != x)
/*Get next node of head and assign it into "n" node. */
n = n.getNext();
/*Get the next node of "y" node and assign it into "v" node. */
Node v = y.getNext();
/*Call setNext() method to set the next node as "y" node by using "n".*/
n.setNext(y);
/*Call setNext() method to set the next node as "x" node by using "y". */
y.setNext(x);
/*Call setNext() method to set the next node as "v" node by using "x". */
x.setNext(v);
Explanation:
In the above algorithm,
- This method accepts two input parameters such as “x” and “y”.
- Create new node “n” and “v” to hold nodes “x” and “y” from singly linked lists.
- The while loop executes until the next node of head is not equal to “x” node.
- Get next node of head and assign it into “n” node.
- Get the next node of “y” node and assign it into “v” node.
- Call setNext() method to set the next node as “y” node by using “n”.
- Call setNext() method to set the next node as “x” node by using “y”.
- Call setNext() method to set the next node as “v” node by using “x”.
- Finally, the two nodes “x” and “y” are swapped in singly linked list.
Algorithm to swap two nodes in doubly linked list:
The algorithm to swap two nodes “x” and “y” in singly linked list “L” is given below:
Algorithm:
Input: Two nodes “x” and “y”.
Output: Swap the two nodes in doubly linked list “L”.
swapDoubly(x, y):
/*Create a node to assign the previous node of "x" node into it...
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
Data Structures and Algorithms in Java
- Implement a function to insert a node at the end of a doubly linked list. Explain the steps involved and analyze the time complexity of your implementation.arrow_forwardJava Programming language Please help me with this. Thanks in advance.arrow_forwardGiven a singly linked list of integers, reverse the nodes of the linked list 'k' at a time and return its modified list. 'k' is a positive integer and is less than or equal to the length of the linked list. If the number of nodes is not a multiple of 'k,' then left-out nodes, in the end, should be reversed as well.Example :Given this linked list: 1 -> 2 -> 3 -> 4 -> 5 For k = 2, you should return: 2 -> 1 -> 4 -> 3 -> 5 For k = 3, you should return: 3 -> 2 -> 1 -> 5 -> 4 Note :No need to print the list, it has already been taken care. Only return the new head to the list. Input format :The first line contains an Integer 't' which denotes the number of test cases or queries to be run. Then the test cases follow. The first line of each test case or query contains the elements of the singly linked list separated by a single space. The second line of input contains a single integer depicting the value of 'k'. Remember/Consider :While specifying the list…arrow_forward
- can I have the solution for this question in Java coding please? Write an algorithm for the following to swap two adjacent elements by adjusting only the links (and not the data) using: Singly-linked lists. Doubly linked lists.arrow_forwardWrite a function to count the number of nodes in a singly linked list. Discuss the approach and complexity of your solution.arrow_forwardGiven two lists sorted in increasing order, create and return a merged list of all the elements in sorted order. You may modify the passed in lists. Ideally, the solution should work in "linear" time, making a single pass through each list.arrow_forward
- Implement a self-organizing list by building a single linked list of nodes and frequently and randomly retrieving data from the list. Show what happens to the list when the count, move to front, and transpose techniques are applied to the same set of frequently retrieved items.arrow_forward#Consider a doubly linked list with 6 nodes. Two headers head and tail are pointing first and last node respectively. Write an algorithm to swap 3rd and 4th nodes. #Consider a doubly linked list with three elements; write an algorithmto delete the middle element of it. Also analyze the algorithm.arrow_forwardSuppose there are two singly linked lists both of which intersect at some point and become a single linked list. The head or start pointers of both the lists are known, but the intersecting node is unknown. Also, the number of nodes in each of the list before they intersect are unknown and both the list may have it different. List1 may have n nodes before it reaches intersection point and List2 might have m nodes before it reaches intersection point where m and n may be m = n, m > n or m < n. Give an algorithm for finding the merging point. Hints: A brute force approach would be to compare every pointer in one list with every pointer in another list. But in this case the complexity would be O(mn)arrow_forward
- Given a circular linked list, implement an algorithm that returns the node at the beginning of the loop.DEFINITIONCircular linked list: A (corrupt) linked list in which a node's next pointer points to an earlier node, soas to make a loop in the linked list.EXAMPLEInput:Output:A -> B -> C -> D -> E -> C [the same C as earlier]Carrow_forwardThe optimal number of elements for a linked list is unknown.Which of the following is the longest?arrow_forwardImplement a recursive version of the size method for SinglyLinkedLists. (Hint: A wrapper may be useful.)arrow_forward
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education