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Grokking the Coding Interview Patterns in C#

Solution: Two Sum IV - Input Is a BST

Explore this lesson to understand how to determine if two nodes in a binary search tree sum to a given value using breadth-first search. Learn to implement a set-based solution that efficiently checks node complements during traversal, improving problem-solving skills in tree and search algorithms.

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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 [1,103][1, 10^3].

  • −103≤-10^3 \leq ...