More Problems

• Find the maximum depth of a binary tree.
• Find the minimum depth of a binary tree.
• Check if two binary trees are the same.
• Find the diameter of a binary tree.
• Validate if a binary tree is a valid binary search tree.
• Find the kth smallest element in a binary search tree.
• Find the kth largest element in a binary search tree.
• Find all leaf nodes of a binary tree.