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Leetcode Problem 272. Closest Binary Search Tree Value II

272. Closest Binary Search Tree Value II

Leetcode Solutions

Approach: Inorder Traversal + Sliding Window

  1. Perform an inorder traversal of the BST and store the values in a sorted array.
  2. Find the index of the element closest to the target using a linear scan or binary search.
  3. Initialize two pointers, left and right, at the closest element's index.
  4. While the window size is less than k, compare the elements at left - 1 and right + 1 to the target and expand the window towards the closer element.
  5. Once the window size reaches k, return the elements within the window.
UML Thumbnail

Approach: Traverse With Heap

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