LeetCode: Recover Binary Search Tree 解題報告
Recover Binary Search Tree Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. ...
原文：LeetCode: Binary Search Tree Iterator 解題報告
Binary Search Tree Iterator Implement an iterator over a binary search tree BST . Your iterator will be initialized with the root node of a BST. Callingnext will return the next smallest number in the ...
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