More Problems

• Write a function to convert a binary tree to a doubly linked list.
• Implement a function to delete the middle node in a linked list.
• How do you insert a node in a doubly linked list before a given node?
• Write a function to check if a linked list is empty.
• How do you append a node to a circular doubly linked list?
• Implement a function to add two numbers represented by linked lists.
• How do you check if a singly linked list has an odd number of nodes?
• Write a function to swap two nodes without swapping data in a linked list.