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Kth Smallest Element in a BST (in-order traversal).

This problem rewards knowing that an in-order traversal of a BST yields sorted order. The signal is stopping early at the kth element rather than traversing the whole tree.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

This problem rewards knowing that an in-order traversal of a BST yields sorted order. The signal is stopping early at the kth element rather than traversing the whole tree.

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