【【leetcode刷题笔记】Minimum Depth of Binary Tree】的更多相关文章

[刷题] 104 Maximum Depth of Binary Tree

要求 求一棵二叉树的最高深度 思路 递归地求左右子树的最高深度 实现 1 Definition for a binary tree node. 2 struct TreeNode { 3 int val; 4 TreeNode *left; 5 TreeNode *right; 6 TreeNode(int x) : val(x), left(NULL), right(NULL) {} 7 }; 8 9 class Solution { 10 public: 11 int maxDepth(Tr…

LeetCode（111） Minimum Depth of Binary Tree

题目 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. 分析 求二叉树的最小深度:根节点到最近叶子节点的路径长度. 同样采用递归的思想: 当根节点为空,返回0: 当根节点为唯一的二叉树节点时,返回1: 否则,求解并返回 最小(非空…

力扣算法题—111.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. Note: A leaf is a node with no children. Example: Given binary tree [3,9,20,null,null,15…

【leetcode❤python】 111. Minimum Depth of Binary Tree

#-*- coding: UTF-8 -*- # Definition for a binary tree node.# class TreeNode(object):#     def __init__(self, x):#         self.val = x#         self.left = None#         self.right = Noneclass Solution(object):    depthList=[]    def minDepth(self, r…

leetcode 刷题之路 64 Construct Binary Tree from Inorder and Postorder Traversal

Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 给出二叉树的中序遍历和后序遍历结果,恢复出二叉树. 后序遍历序列的最后一个元素值是二叉树的根节点的值.查找该元素在中序遍历序列中的位置mid,依据中序遍历和后序遍历性质.有: 位置mid曾经的序列部分为二叉树根节点左子树中…

leetcode刷题-559. Maximum Depth of N-ary Tree

题目: https://leetcode.com/problems/maximum-depth-of-n-ary-tree/description/ n-ary-tree的数据结果表示 // Definition for a Node. class Node { public: int val; vector<Node*> children; Node() {} Node(int _val, vector<Node*> _children) { val = _val; childr…

［leetcode刷题笔记］Implement Trie (Prefix Tree)

题目链接 一A,开森- ac代码: class TrieNode { // Initialize your data structure here. char content; boolean isWord; int count; LinkedList<TrieNode> childList; public TrieNode(char c) { content = c; isWord = false; count = 0; childList = new LinkedList<TrieN…

LeetCode:Minimum Depth of Binary Tree,Maximum Depth of Binary Tree

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. 算法1:dfs递归的求解 class Solution { public: int minDepth(T…

【LeetCode练习题】Minimum Depth of Binary Tree

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. 和上一题对应,求二叉树的最小深度. 解题思路: 参考上一题Maximun Depth of Binary Tree中最后那…

【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: im…