Linked List

You are given an array of k linked lists, each linked list is sorted in ascending order. Merge all the linked lists into one sorted linked list and return it.

Given a singly-linked list, find the middle node of the list. If the list contains an even number of nodes, return the second middle node.

Given a linked list, determine if it contains a cycle. If a cycle is present, find the node where the cycle begins and return it. If there is no cycle, return nullptr.

Given a linked list, determine if it has a cycle in it. A cycle is when a node in the linked list points to a previously visited node, forming a loop. Return true if there is a cycle, otherwise, return false.

Given the head of a singly linked list and an integer k, reverse the nodes of the list k at a time and return the new head of the reversed linked list. If the number of nodes in the linked list is not a multiple of k, leave the remaining nodes as they are. Example:… Read more: Reverse Nodes in k-Group

Given the head of a singly linked list and two integers left and right, reverse the nodes of the list from position left to position right, and return the new head of the reversed sublist. Positions are 1-indexed, meaning the head node is at position 1. Example: Input: Output: Explanation: In the input, the linked… Read more: Reverse Linked List II

Given the head of a singly linked list and an integer k, rotate the linked list to the right by k places. The rotation means moving the last k nodes to the front of the list.

Given the head of a singly linked list, reverse the list in-place and return the new head of the reversed linked list.

A linked list is a fundamental data structure in computer science used for storing and organizing a collection of elements called nodes. Unlike arrays, which use contiguous memory, linked lists utilize non-contiguous memory and each node contains two parts: the data and a reference (pointer) to the next node in the sequence.