More Problems

• Write a function to merge k unsorted linked lists into one sorted circular singly linked list using merge sort.
• How do you flatten a doubly linked list where each node contains both a next pointer and a sibling pointer to another list?
• Implement a function to rotate a circular singly linked list so that every second node becomes the new head.
• Write a function to detect and merge two linked lists where both lists contain multiple cycles and backward pointers.
• How do you reverse every k-th node in a multilevel doubly linked list where nodes have child and sibling pointers?
• Write a function to rotate a circular singly linked list such that the node with the lowest value becomes the new head.
• How do you merge two sorted doubly linked lists where each node contains a random pointer to any other node in the list?
• Implement a function to reverse the first and last k nodes in a circular doubly linked list while leaving the middle unchanged.