Javascript Program For Counting Rotations In Sorted And Rotated Linked List Last Updated : 02 Sep, 2024 Summarize Comments Improve Suggest changes Share Like Article Like Report Given a linked list of n nodes which is first sorted, then rotated by k elements. Find the value of k.The idea is to traverse singly linked list to check condition whether current node value is greater than value of next node. If the given condition is true, then break the loop. Otherwise increase the counter variable and increase the node by node->next. Below is the implementation of this approach. JavaScript // Program for count number of rotations in // sorted linked list. /* Linked list node */ class Node { constructor() { this.data = 0; this.next = null; } } // Function that count number of // rotation in singly linked list. function countRotation(head) { // declare count variable and assign it 1. let count = 0; // declare a min variable and assign to // data of head node. let min = head.data; // check that while head not equal to null. while (head != null) { // if min value is greater then head.data // then it breaks the while loop and // return the value of count. if (min > head.data) break; count++; // head assign the next value of head. head = head.next; } return count; } // Function to push element in linked list. function push(head, data) { // Allocate dynamic memory for newNode. let newNode = new Node(); // Assign the data into newNode. newNode.data = data; // newNode.next assign the address of // head node. newNode.next = (head); // newNode become the headNode. (head) = newNode; return head; } // Display linked list. function printList(node) { while (node != null) { console.log(node.data + " "); node = node.next; } } // Driver functions // Create a node and initialize with null let head = null; // push() insert node in linked list. // 15.18.5.8.11.12 head = push(head, 12); head = push(head, 11); head = push(head, 8); head = push(head, 5); head = push(head, 18); head = push(head, 15); console.log("Linked list:"); printList(head); console.log("rotated elements: "); // Function call countRotation() console.log(countRotation(head)); // This code is contributed by unknown2108 OutputLinked list: 15 18 5 8 11 12 rotated elements: 2 Time Complexity: O(n), where n is the number of elements present in the linked list. This is because we are traversing the whole linked list in order to find the count.Auxiliary Space: O(1), As we are not using any extra space.Please refer complete article on Count rotations in sorted and rotated linked list for more details! Comment More infoAdvertise with us Next Article Javascript Program for Clockwise rotation of Linked List K kartik Follow Improve Article Tags : JavaScript rotation Similar Reads Count rotations in sorted and rotated linked list Given a linked list of n nodes which is first sorted, then rotated by k elements. Find the value of k. The idea is to traverse singly linked list to check condition whether current node value is greater than value of next node. If the given condition is true, then break the loop. Otherwise increase 8 min read Javascript Program For Rotating A Linked List Given a singly linked list, rotate the linked list counter-clockwise by k nodes. Where k is a given positive integer. For example, if the given linked list is 10->20->30->40->50->60 and k is 4, the list should be modified to 50->60->10->20->30->40. Assume that k is smal 5 min read Javascript Program for Clockwise rotation of Linked List Given a singly linked list and an integer K, the task is to rotate the linked list clockwise to the right by K places.Examples: Input: 1 -> 2 -> 3 -> 4 -> 5 -> NULL, K = 2 Output: 4 -> 5 -> 1 -> 2 -> 3 -> NULLInput: 7 -> 9 -> 11 -> 13 -> 3 -> 5 -> NULL 4 min read Javascript Program to Rotate Linked List block wise Given a Linked List of length n and block length k rotate in a circular manner towards right/left each block by a number d. If d is positive rotate towards right else rotate towards left.Examples: Input: 1->2->3->4->5->6->7->8->9->NULL, k = 3 d = 1Output: 3->1->2- 3 min read Find the Rotation Count in Rotated Sorted array in JavaScript A Rotated Sorted Array is an array type in JavaScript that has been rotated to the left or right by some random number of positions. In this article, we will understand how to find the count of rotations performed on the original sorted array to obtain the given sorted array using JavaScript languag 5 min read Javascript Program for Search an element in a sorted and rotated array An element in a sorted array can be found in O(log n) time via binary search. But suppose we rotate an ascending order sorted array at some pivot unknown to you beforehand. So for instance, 1 2 3 4 5 might become 3 4 5 1 2. Devise a way to find an element in the rotated array in O(log n) time. Exam 7 min read Like