More Problems

• Write a function to flatten a linked list where each node contains both a next pointer and a down pointer to another linked list.
• How do you merge two sorted linked lists where nodes may have duplicate values and random pointers?
• Implement a function to perform in-place radix sort on a singly linked list where nodes store string values.
• Write a function to rotate a doubly linked list such that every k-th node becomes the new head using recursion.
• How do you detect the first common node in two circular linked lists with cycles at different points?
• Implement a function to reverse every k-th node in a doubly linked list while preserving the relative order of other nodes.
• Write a function to merge two sorted circular doubly linked lists where one list is sorted in ascending order and the other in descending order.
• How do you rotate a circular singly linked list such that the node with the highest value becomes the new head?