classSolution:v_min=-sys.maxsize-1v_max=sys.maxsize+1defisValidBST(self,root:TreeNode)->bool:ifnotroot:returnFalsereturnself._checkSubTree(root,self.v_min,self.v_max)def_checkSubTree(self,node:TreeNode,v_min:int,v_max:int)->bool:ifnotnode:returnTrueifnode.val<=v_minornode.val>=v...
链接:https://leetcode-cn.com/problems/binary-tree-inorder-traversal python # 0094.二叉树中序遍历 # 递归 & 迭代 class Solution: def inOrderRecur(self,head: TreeNode) -> int: """ 递归遍历,LNR, 左根右 :param head: :return: """ def traversal(head): # 递归终止条件 ifhead== None: ...
return its level order traversal as: [ [3], [9,20], [15,7] ] Solution: #Definition for a binary tree node.#class TreeNode(object):#def __init__(self, x):#self.val = x#self.left = None#self.right = NoneclassSolution(object):deflevelOrder(self, root):""":type root: TreeNo...
# Python program to introduce Binary Tree# A class that represents an individual node in a# Binary TreeclassNode:def__init__(self,key):self.left=Noneself.right=Noneself.val=key# create rootroot=Node(1)''' following is the tree after above statement1/ \None None'''root.left=Node(2);...
二叉树binarytraversaltree遍历 砖业洋__ 2023-05-06 题目地址:https://leetcode.com/problems/binary-tree-preorder-traversal/description/ 17730 67. Add Binary(二进制求和)addbinarystring二进制字符串 砖业洋__ 2023-05-06 题目地址:https://leetcode.com/problems/add-binary/description/ 11310 MySQL...
Given a binary tree, return the inorder traversal of its nodes' values. For example: Given binary tree [1,null,2,3], 1 \ 2 / 3 return [1,3,2]. Note: Recursive solution is trivial, could you do it iteratively? 1. 2. 3. ...
102. Binary Tree Level Order Traversal刷题笔记 考察二叉树的层序遍历 问题描述leetcode代码: AI检测代码解析 # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val...
Open-source code analysis platform for C/C++/Java/Binary/Javascript/Python/Kotlin based on code property graphs. Discord https://discord.gg/vv4MH284Hc - joernio/joern
python defpostorderTraversal(root):""" :type root: TreeNode :rtype: List[int] """rs=[]defdfs(node):ifnode:dfs(node.left)dfs(node.right)rs.append(node.val)dfs(root)returnrsdefpostorderTraversalV2(root):defdfs(node):ifnotnode:return[]returndfs(node.left)+dfs(node.right)+[node.val]...
python defpreorderTraversal(root):""" :type root: TreeNode :rtype: List[int] """rs=[]defdfs(node):ifnotnode:returnrs.append(node.val)dfs(node.left)dfs(node.right)dfs(root)returnrsdefpreorderTraversalV2(root):defdfs(node):ifnotnode:return[]return[node.val]+dfs(node.left)+dfs(node...