*/classSolution{public List<Integer>inorderTraversal(TreeNode root){List<Integer>result=newLinkedList<>();TreeNode current=root;TreeNode prev=null;while(current!=null){// left firstif(current.left==null){result.add(current.val);current=current.right;}// if there is left, get the rightmost ...
具体可见:https://leetcode.com/problems/binary-tree-inorder-traversal/solution/ /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * };*/classSolution {public: ...
//Binary tree traversal-- level-order traversal using queue#include<iostream>#include<queue>//STLusingnamespacestd;structnode{intdata; node *left, *right; };node*getnewnode(intx){ node* temp =newnode; temp->data = x; temp->left = temp->right =NULL;returntemp; }voidinsert(node*& tr...
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 ...
94. Binary Tree Inorder Traversal刷题笔记 问题描述中序遍历,用的是递归法,当然也可以用迭代法(栈) 代码 # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val...
* Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */class Solution{public:vector<int>inorderTraversal(TreeNode*root){vector<int>res;inorder(root,res);return...
Binary Tree Preorder Traversal 题目链接 题目要求: Given a binary tree, return thepreordertraversal of its nodes' values. For example: Given binary tree{1,#,2,3}, 1 \ 2 / 3 1. 2. 3. 4. 5. return[1,2,3]. Note: Recursive solution is trivial, could you do it iteratively?
voidTree::n_preorder(){ Node* node; stack nodeStack; cout <<"\nPreorder:"; nodeStack.push(root);while(!nodeStack.isEmpty()) { node = nodeStack.pop(); cout <<" "<< node->data;// As a stack is LIFO (last-in-first-out), we add the node's children// on the stack in re...
class in which every tree node has a pointer to data of the givendata type. The desired data type is given as atemplate parameter. We define basic tree manipulation methods in the generic treelayer, including inserting/deleting a leaf from the tree, and performing tree reduction and traversal...
//Binary tree traversal-- beadth-first and depth-first#include<iostream>#include<queue>//STLusingnamespacestd;structnode{intdata; node *left, *right; };node*getnewnode(intx){ node* temp =newnode; temp->data = x; temp->left = temp->right =NULL;returntemp; ...