More Problems

• Implement a function to flatten a binary tree to a linked list in a preorder traversal.
• Find the path with the maximum sum in a binary search tree that starts from any node.
• Check if a binary tree can be converted to a binary search tree by changing at most one node.
• Find the longest palindromic subsequence in a binary tree.
• Implement a function to create a balanced binary search tree from a sorted array.
• Find the sum of nodes with odd values in a binary search tree.
• Count the number of internal nodes in a binary tree.
• Implement a function to find all unique BSTs that can be formed with a given number of nodes.