题意:如题,平衡树是指任意一个节点(除了叶子),其左子树的高度与右子树的高度相差不超过1. 思路:递归解决,但是提供的函数不满足递归的要求啊,我们至少得知道高度,又得返回真假,所以另开个函数解决. /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), ri…

Balanced Binary Tree 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. Show Tags SOLU…

问题: 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. 分析: 判断平衡二叉树,第一想法肯定是求出左右子树的深度,看是…

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. 题意:二叉树中以任意节点为父结点的两棵子树的深度差不超过1,为平衡二叉…

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. 求二叉树是否平衡,根据题目中的定义,高度平衡二叉树是每一个节点的两个字…

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. 在求高度的过程中判断是否为平衡树.. /** * Definition…

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. Hide Tags Tree Depth-first Search /…

原题地址:http://oj.leetcode.com/problems/balanced-binary-tree/ 题意:判断一颗二叉树是否是平衡二叉树. 解题思路:在这道题里,平衡二叉树的定义是二叉树的任意节点的两颗子树之间的高度差小于等于1.这实际上是AVL树的定义.首先要写一个计算二叉树高度的函数,二叉树的高度定义为:树为空时,高度为0.然后递归求解:树的高度 = max(左子树高度,右子树高度)+1(根节点要算上).高度计算函数实现后,递归求解每个节点的左右子树的高度差,如果有大于1的…

题目: 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. 思路: 1) 计算结点的高度,但这个有重复计算 package…

判断二叉树是否平衡 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. 以下解法为什么时间复杂度为O(n)? /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNod…