返回一棵 BST的两个结点的最小绝对值的距离之差。 Given a binary search tree with non-negative values, find the minimumabsolute differencebetween values of any two nodes. 题解:根据 BST 的性质,我们只需要用一个变量记录中序遍历的前一个结点prev即可。 View Code 【683】K Empty Slots 【699】Falling...
* type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * } */ type BSTIterator struct { // 结点栈(所有结点的左子结点都已经入栈过) stack []*TreeNode } func Constructor(root *TreeNode) BSTIterator { // 初始化一个空栈的迭代器 bstIterator := BSTIterator{} // 将...
3. Binary Tree Zigzag Level Order Traversal Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree[3,9,20,null,null,15,7], 3 / \ 9 20 ...
return dfs(root.Left, low, &root.Val) && dfs(root.Right, &root.Val, high) } 题目链接: Validate Binary Search Tree: leetcode.com/problems/v 带因子的二叉树: leetcode.cn/problems/va LeetCode 日更第 209 天,感谢阅读至此的你 欢迎点赞、收藏鼓励支持小满 ...
LeetCode Top 100 Liked Questions 98. Validate Binary Search Tree (Java版; Medium) 题目描述 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...
My code: /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */publicclassSolution{publicbooleanisValidBST(TreeNoderoot){if(root==null)returntrue;longmin=((long)Integer.MIN_VALUE...
https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/ Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 分析: Input:So we're given a sorted array in ascending order. ...
package leetcode // TreeNode define type TreeNode = structures.TreeNode /** * Definition for a binary tree node. * type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * } */ // BSTIterator define type BSTIterator struct { ...
Binary Tree Puzzles and Interview Questions Many of the "programming puzzle of the day", or "dev job interview questions" relate to binary trees. This repo contains a binary tree implementation in a Go package, as well as code that solves puzzle-or-problem-of-the-day questions....
701. Insert into a Binary Search Tree Given the root node of a binary search tree (BST) and a value to be inserted into the tree, insert the value into the BST. Return the root node of the BST after the insertion. It is guaranteed that the new value does not exist in the original...