Medium Accuracy: 49.44%
Submissions: 63189 Points: 4
Given a BST and an integer K. Find the Kth Smallest element in the BST.
Example 1:
Input:
2
/ \
1 3K = 2
Output: 2
Example 2:
Input:
2
/ \
1 3
K = 5
Output: -1
Your Task:
You don't need to read input or print anything. Your task is to complete the function KthSmallestElement() which takes the root of the BST and integer K as inputs and return the Kth smallest element in the BST, if no such element exists return -1.
Expected Time Complexity: O(N). Expected Auxiliary Space: O(1).
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On submission, your code is tested against multiple test cases consisting of all
possible corner cases and stress constraints.
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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