LeetCode 110 Balanced Binary Tree === 方法一: 平衡二叉树的判定,一般来说可以在TreeNode数据结构中增加一个depth表示以该节点为根节点的子树的深度,从而利用左右儿子节点子树深度的差值做判断。 注意这里的depth是子树的深度,而不是节点的深度,这两者是相反的。 这里由于无法修改数据结构,在每次判断子树深度时都...
classSolution2 {public:boolisBalanced(TreeNode*root) {if(root==NULL){returntrue; }intheight=getheight(root);if(height==-1){returnfalse; }returntrue; }intgetheight(TreeNode *root){if(root==NULL){return0; }intlleft=getheight(root->left);inttrigth=getheight(root->right);if(lleft==-1...
package leetcode /** * Definition for a binary tree node. * type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * } */ func isBalanced(root *TreeNode) bool { if root == nil { return true } leftHight := depth(root.Left) rightHight := depth(root.Right) retur...
Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as: a binary tree in which the depth of the two subtrees ofeverynode never differ by more than 1. Example 1: Given the following tree[3,9,20,null,null,15,7]: 3 /...
For this problem, a height-balanced binary tree is defined as:a binary tree in which the left and right subtrees of every node differ in height by no more than 1. 英文版地址 leetcode.com/problems/b 中文版描述 给定一个二叉树,判断它是否是高度平衡的二叉树。本题中,一棵高度平衡二叉树定义...
LeetCode 110. Balanced Binary Tree Description Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as: a binary tree in which the depth of the two subtrees of every node never differ by more than 1. Example 1: Given the ...
Can you solve this real interview question? Balanced Binary Tree - Given a binary tree, determine if it is height-balanced. Example 1: [https://assets.leetcode.com/uploads/2020/10/06/balance_1.jpg] Input: root = [3,9,20,null,null,15,7] Output: tru
LeetCode—110. Balanced Binary Tree 题目 https://leetcode.com/problems/balanced-binary-tree/description/ 判断一棵二叉树是否是平衡二叉树。 平衡二叉树指的是,两棵子树的任一节点的深度相差不超过1. 思路及解法 首先写一个函数用来得到每一个子树的深度,然后递归调用原函数,判断两棵子树的深度差... ...
* Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ class Solution { public boolean isBalanced(TreeNode root) { return deepth(root) != -1; ...
https://leetcode.com/problems/balanced-binary-tree/ 题目: Given a binary tree, determine if it is height-balanced. every 思路: 根据结点高度,递归判断是否满足平衡树定义。此题跟Kth Smallest Element in a BST做法类似,在遍历过程中遇到满足某条件的结点时,将结果放到全局变量中,如果没遇到最终递归返回的...