LeetCode: Recover Binary Search Tree 解题报告
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: Validate Binary Search Tree 解题报告
Validate Binary Search Tree Given a binary tree, determine if it is a valid binary search tree BST .Assume a BST is defined as follows:The left subtree of a node contains only nodes with keys less tha ...
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