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CCI4.5/LintCode Validate Binary Search Tree

Validate BST是指按中序遍历niorder后左<node<右: 第一种方法: 先按inoreder遍历, 再放进ArrayList里用循环看是不是从小到大排序: 注意: 设置成员变量list时,如果先new作ArrayList, 则在main函数里每次用都得new个新的class对象: 如果不想在main里每次都new, 则在判断valid的函数里再new作ArrayList, 这样就每次用这个函数时都会自己new了: (因为list特性的add功能会被不停地加, 而不是自身清空再加…

LintCode Validate Binary Search Tree

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 than the node's key. The right subtree of a node c…

Leetcode 笔记 98 - Validate Binary Search Tree

题目链接:Validate Binary Search Tree | LeetCode OJ 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 than the node's key. The right…

Validate Binary Search Tree

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 than the node's key. The right subtree of a node c…

【leetcode】Validate Binary Search Tree

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 than the node's key. The right subtree of a node c…

39. Recover Binary Search Tree && Validate Binary Search Tree

Recover Binary Search Tree OJ: https://oj.leetcode.com/problems/recover-binary-search-tree/ Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is prett…

[CareerCup] 4.5 Validate Binary Search Tree 验证二叉搜索树

4.5 Implement a function to check if a binary tree is a binary search tree. LeetCode上的原题,请参见我之前的博客Validate Binary Search Tree 验证二叉搜索树.…

【LeetCode练习题】Validate Binary Search Tree

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 than the node's key. The right subtree of a node c…

leetcode dfs Validate Binary Search Tree

Validate Binary Search Tree Total Accepted: 23828 Total Submissions: 91943My Submissions 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…

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 than the node's key.The right subtree of a node co…