【Leetcode_easy】993. Cousins in Binary Tree

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【leetcode_easy】543. Diameter of Binary Tree

problem 543. Diameter of Binary Tree 参考 1. Leetcode_easy_543. Diameter of Binary Tree; 完 原文地址:https://www.cnblogs.com/happyamyhope/p/10943221.html

【LeetCode】 Maximum Depth of Binary Tree

Maximum Depth of Binary Tree  Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 递归基础,不解释. class Solution { public: int getMax(TreeNode *root

【LeetCode】Minimum Depth of Binary Tree 二叉树的最小深度 java

[LeetCode]Minimum Depth of Binary Tree Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 递归和非递归,此提比较简单.广度优先遍历即可.关键之处就在于如何保持访问深度. 下面是4种代码: 1

【leetcode】Maximum Depth of Binary Tree

Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 利用递归. 也可以使用栈和队列,即使用DFS和BFS方法. C++: 1 /** 2 * Definition for binary tree 3 * struct TreeNod

【树】Serialize and Deserialize Binary Tree

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【LeetCode】105 & 106. Construct Binary Tree from Inorder and Postorder Traversal

题目: Given inorder and postorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. 提示: 题目要求通过一颗二叉树的中序遍历及后续遍历的结果,将这颗二叉树构建出来,另外还有一个已知条件,所有节点的值都是不同的. 首先需要了解一下二叉树不同遍历方式的定义: 前序遍历:首先访问根结点,然后遍历左子树,最

【LeetCode】105 & 106 Construct Binary Tree from (Preorder and Inorder) || (Inorder and Postorder)Traversal

Description: Given arrays recording 'Preorder and Inorder' Traversal (Problem 105) or  'Inorder and Postorder' (Problem 106), u need build the binary tree. Input: 105. Preorder & Inorder traversal 106. Inorder & Postorder traversal output: A binar

【Leetcode_easy】617. Merge Two Binary Trees

problem 617. Merge Two Binary Trees 参考 1. Leetcode_easy_617. Merge Two Binary Trees; 完 原文地址:https://www.cnblogs.com/happyamyhope/p/11076297.html

【leetcode刷题笔记】Maximum Depth of Binary Tree

Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 题解:递归,树的高度 = max(左子树高度,右子树高度)+1: 代码如下: 1 /** 2 * Definition for binary tree 3 * public cla