More Problems

• 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.
• Determine if a binary tree is a perfect binary tree.
• Find all root-to-leaf paths in a binary tree.
• Find the maximum path sum in a binary tree.