Kth Smallest Element In BST
Detailed guide and Python implementation for the 'Kth Smallest Element In BST' problem.
Problem Statement
Given the root of a binary search tree, and an integer k, return the kth smallest value (1-indexed) of all the values of the nodes in the tree.
The tree is represented as a level-order list. Implement a function kthSmallest(root: list, k: int) -> int.
- •The number of nodes in the tree is n
- •1 <= k <= n <= 10000
- •0 <= Node.val <= 10000
Examples
[3,1,4,None,2], 1
1
The in-order traversal is [1,2,3,4]. The 1st smallest is 1.
[5,3,6,2,4,None,None,1], 3
3
The in-order traversal is [1,2,3,4,5,6]. The 3rd smallest is 3.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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