［抄题］: You need to find the largest value in each row of a binary tree. Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9] [暴力解法]: 时间分析: 空间分析: [优化后]: 时间分析: 空间分析: ［奇葩输出条件］: ［奇葩corner case］: ［思维问题］: 不知道怎么确定每一行的大小:不熟悉bfs.其中q每次只存了一行,所以size就是当前数组的大小 ［…

lc 515 Find Largest Value in Each Tree Row 515 Find Largest Value in Each Tree Row You need to find the largest value in each row of a binary tree. Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9] BFS Accepted 相比之前的几道用到BFS算法的题目,这题相对来说会繁琐一些,需要用…

在二叉树的每一行中找到最大的值.示例:输入:           1         /  \        3   2       /  \    \        5   3    9 输出: [1, 3, 9] 详见:https://leetcode.com/problems/find-largest-value-in-each-tree-row/description/ C++: /** * Definition for a binary tree node. * struct Tree…

You need to find the largest value in each row of a binary tree. Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9] --------------------------------------------------------------------------就是找出二叉树的每一层的最大数.用BFS较为简单. C++代码: /** * Definition for a…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 BFS DFS 日期 题目地址:https://leetcode.com/problems/find-largest-value-in-each-tree-row/#/description 题目描述 You need to find the largest value in each row of a binary tree. Example: I…

You need to find the largest value in each row of a binary tree. Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9]题目含义:从上到下找到每行的最大值方法一:DFS 参数d表示层数的索引,第一行对应的d为0 1 private void largestValue(TreeNode root, List<Integer> res, int d){ 2 if(root ==…

515. 在每个树行中找最大值 515. Find Largest Value in Each Tree Row 题目描述 You need to find the largest value in each row of a binary tree. 您需要在二叉树的每一行中找到最大的值. LeetCode515. Find Largest Value in Each Tree Row Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9…

Leetcode之深度优先搜索(DFS)专题-515. 在每个树行中找最大值(Find Largest Value in Each Tree Row) 深度优先搜索的解题详细介绍,点击 您需要在二叉树的每一行中找到最大的值. 示例: 输入: 1 / \ 3 2 / \ \ 5 3 9 输出: [1, 3, 9] 分析:题意很简单,直接DFS. /** * Definition for a binary tree node. * public class TreeNode { * int val;…

You need to find the largest value in each row of a binary tree. Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9] 这道题让我们找二叉树每行的最大的结点值,那么实际上最直接的方法就是用层序遍历,然后在每一层中找到最大值,加入结果res中即可,参见代码如下: 解法一: class Solution { public: vector<int> largestValues(T…

You need to find the largest value in each row of a binary tree. Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9] 您需要在二叉树的每一行中找到最大的值. 示例: 输入: 1 / \ 3 2 / \ \ 5 3 9 输出: [1, 3, 9] 48ms /** * Definition for a binary tree node. * public class Tree…