Given the head of a sorted doubly linked list, remove all duplicate nodes from the list. Each node should appear only once…

Given a sorted doubly linked list and a target sum, find all pairs of nodes whose sum equals the target. Return…

Given a doubly linked list and a key, delete all occurrences of the given key from the doubly linked list. Here’s…

You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes…

You are given a linked list that represents a number. Each node contains a single digit, and the digits are stored in…

Given the heads of two singly linked-lists headA and headB, return the node at which the two lists intersect. If the two linked lists…

Given the head of a linked list where nodes can contain values 0s, 1s, and 2s only. Your task is to rearrange the list so that all 0s appear at the beginning,…

Given the head of a linked list, return the list after sorting it in ascending order. Here’s the [Problem Link] to begin with. Example…

You are given the head of a linked list. Delete the middle node, and return the head of the modified linked list. The middle node of a linked list of…

Given the head of a linked list, remove the nth node from the end of the list and return its head. Here’s the [Problem…