More Problems

• Find the second smallest element in a binary search tree.
• Calculate the number of nodes in a binary tree that are leaf nodes.
• Implement a function to find all ancestors of a specific node in a binary search tree.
• Find the total number of unique binary search trees that can be formed using N distinct values.
• Count the number of nodes with two children in a binary tree.
• Implement a function to check if a binary search tree can be balanced.
• Find the first common ancestor of two nodes in a binary tree.
• Create a function to convert a binary tree to a doubly linked list.