LeetCode Kth Smallest Element in a BST
LeetCode 230 in detail — the inorder traversal trick, the iterative early-exit version, and the follow-up that haunts FAANG interviews.
·4 min read · #dsa#leetcode#trees
#bst
3 posts.
LeetCode Lowest Common Ancestor of a BST
LeetCode 235 walked through end to end — why BST ordering collapses LCA into a one-line traversal, and the iterative version that needs zero extra space.
·5 min read · #dsa#leetcode#trees
LeetCode Validate Binary Search Tree
LeetCode 98 in full — the seductive wrong answer, the correct min/max bounds approach, and how to defend it in an interview.
·5 min read · #dsa#leetcode#trees