Solution: Two Sum IV - Input Is a BST
Explore how to determine if two nodes in a binary search tree sum to a target value. Learn to apply breadth-first search combined with a set for tracking visited values, enabling efficient early detection of complements. This lesson helps you implement and optimize an algorithm to solve the Two Sum IV problem using BFS in a BST.
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Statement
Given the root of a binary search tree and an integer k, determine whether there are two elements in the BST whose sum equals k. Return TRUE if such elements exist or FALSE otherwise.
Constraints:
The number of nodes in the tree is in the range
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