1/**2* Definition for a binary tree node.3* struct TreeNode {4* int val;5* TreeNode *left;6* TreeNode *right;7* TreeNode(int x) : val(x), left(NULL), right(NULL) {}8* };9*/10classSolution {11public:12vector<vector<int>> levelOrder(TreeNode*root) {13vector<vector<int>>...
一、递归实现 1/**2* Definition for binary tree3* struct TreeNode {4* int val;5* TreeNode *left;6* TreeNode *right;7* TreeNode(int x) : val(x), left(NULL), right(NULL) {}8* };9*/10classSolution {11public:12vector<vector<int> > levelOrder(TreeNode *root) {13vector<vector...
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree{3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its level order traversal as: [ [3], [9,20], [15,7] ] 方法: 做了这...
Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level). Example 1: Input: root = [3,9,20,null,null,15,7] Output: [[3],[9,20],[15,7]] Example 2: Input: root = [1] Output: [[1]] Example ...
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 return its level order traversal as: ...
class TreeNodeWithDepth { TreeNode treeNode; int depth; public TreeNodeWithDepth(TreeNode treeNode, int depth) { this.treeNode = treeNode; this.depth = depth; } } public class Solution { //Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to...
Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree{3,9,20,#,#,15,7}, 3 / \ ...
This study creates a highly robust ensemble learning model by combining classifiers from several categories, including pattern mining SVM, decision tree, neural network, and extreme learning machine. The strategic combination of various machine learning methods provides a heterogeneous ensemble model for ...
In this article, we will discuss 3 different techniques for Level Order Traversal of a binary tree. This technique can be used to find the left and right view of the tree.
In this article, we will learn how to reverse the level order traversal of binary tree in C++. The level order traversal is quite easy and the trick is to maintain a queue and print the elements in it. But for this topic, we have to maintain a stack additionally. If you don’t know...