Freaks City

Valid Binary Search Tree (BST) properties: A node's left subtree contains only nodes with values less than the node's value. A node's right subtreee contains only nodes with values greater than the node's value. Both left and right subtrees must also be valid BSTs. Example 1: Input: root = [2,1,3] Output: true Example 2: Input: root = [5,1,4 ...

A Binary Search Tree (BST) is defined as either an empty tree or a tree satisfying these conditions: for any node, all values in its left subtree are less than its own value, and all values in its right subtree are greater. Both subtrees must also be BSTs. Given a sequence of unique integers, insert them sequentially into an initial empty BST. ...