link:[https://leetcode.com/explore/learn/card/data-structure-tree/134/traverse-a-tree/928/] 递归解法: #Definition for a binary tree node.#class TreeNode(object):#def __init__(self, x):#self.val = x#self.left = None#self.right = NoneclassSolution(object):defsolve(self,root):ifroo...
if(root->left) levelorder(root->left, level + 1, res); if(root->right) levelorder(root->right, level + 1, res); } }; 类似题目: [LeetCode] 107. Binary Tree Level Order Traversal II 二叉树层序遍历 II [LeetCode] 199. Binary Tree Right Side View 二叉树的右侧视图 All LeetCode Qu...
算法与数据结构基础 - 二叉树(Binary Tree) bangerlee 来自专栏 · 算法与数据结构基础 6 人赞同了该文章 二叉树基础 满足这样性质的树称为二叉树:空树或节点最多有两个子树,称为左子树、右子树, 左右子树节点同样最多有两个子树。 二叉树是递归定义的,因而常用递归/DFS的思想处理二叉树相关问题,例如LeetCode...
二叉树及leetcode练习题 二叉树c++编程算法 二叉树二叉树天然的递归结构二叉树本身就是一个递归的定义。先来看一下递归的前序遍历: void preorder(TreeNode* node) { if (node) { cout<<node->val; preorder(node->left); prorder(node->right); } } 递归的定义:递归终止条件 + 递归过程前序遍历 void...
private void pushAllTheLeft(Stack<TreeNode> s, TreeNode root){ s.push(root); while(root.left!=null){ root = root.left; s.push(root); } } } Binary Tree Postorder Traversal Given a binary tree, return the postorder traversal of its nodes' values. ...
LeetCode199题 Binary Tree Right Side View, 解题思路。 1、先读题,凡是同一层的,有右边的节点,只添加右边的。 2、用bfs去解决,队列先添加右子树,再添加左子树,队列除了带node 信息,还得有当前层数的信息。 3、循环处理,当前层数没有被使用,就添加node的val。
【LeetCode】199. Binary Tree Right Side View 解题报告(Python) 标签: LeetCode 题目地址:https://leetcode.com/problems/binary-tree-right-side-view/description/ 题目描述: Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered...
Blogger:https://blog.baozitraining.org/2019/10/leetcode-solution-199-binary-tree-right.html Youtube:https://youtu.be/_g6pN64bF-o 博客园: https://www.cnblogs.com/baozitraining/p/11595617.html B站: https://www.bilibili.com/video/av69112013/ ...
Leetcode 之Binary Tree Postorder Traversal(44) 后序遍历,比先序和中序都要复杂。访问一个结点前,需要先判断其右孩子是否被访问过。如果是,则可以访问该结点;否则,需要先处理右子树。 vector<int> postorderTraversal(TreeNode *root) { vector<int>result;...
0173-binary-search-tree-iterator 0186-reverse-words-in-a-string-ii 0189-rotate-array 0198-house-robber 0199-binary-tree-right-side-view 0200-number-of-islands 0202-happy-number 0205-isomorphic-strings 0206-reverse-linked-list 0207-course-schedule 0208-implement-trie-prefix-tree 0209-minimum-size-...