More Problems

• How do you merge k sorted doubly linked lists into one sorted circular doubly linked list?
• Implement a function to convert a doubly linked list into a balanced binary search tree (BST) in-place.
• Write a function to rotate a multilevel circular doubly linked list by k positions where each node has multiple children.
• How do you implement a sparse linked list that supports fast insertions and deletions at arbitrary positions?
• Implement a function to reverse the second half of a circular doubly linked list while preserving the first half.
• Write a function to rearrange nodes in a circular singly linked list such that the list alternates between even and odd values.
• How do you merge two linked lists where each node has a forward and backward pointer, and the lists are sorted in opposite orders?
• Implement a function to find the intersection point of two linked lists that may have cycles.