Given a binary search tree, print the elements in-order iteratively without using recursion.Note:Before you attempt this problem, you might want to try coding a pre-order traversal iterative solution first, because it is easier. On the other hand, coding a post-order iterative version is a ...
* TreeNode(int x) : val(x), left(NULL), right(NULL) {} * };*/classSolution {public: vector<int> inorderTraversal(TreeNode *root) { vector<int>ret;if(!root)returnret; inorder(root, ret);returnret; }voidinorder(TreeNode* root, vector<int>&ret) {if(root->left) inorder(root-...
Lintcode67 Binary Tree Inorder Traversal solution 题解 【题目描述】 Given a binary tree, return the inorder traversal of its nodes' values. 给出一棵二叉树,返回其中序遍历 【题目链接】 www.lintcode.com/en/problem/binary-tree-inorder-traversal/ 【题目解析】 递归版 最好理解,递归调用时注意返回...
Given abinary tree, return theinordertraversal of its nodes' values. 知识点: Recursion Iteration Threaded binary tree 二刷: 要求的iteration: 最初做法: class Solution: def inorderTraversal(self, root: TreeNode) -> List[int]: if not root: return [] ans = [] stack = [root] l = [0]...
publicList<Integer>inorderTraversal3(TreeNoderoot){List<Integer>ans=newArrayList<>();TreeNodecur=root;while(cur!=null){//情况 1if(cur.left==null){ans.add(cur.val);cur=cur.right;}else{//找左子树最右边的节点TreeNodepre=cur.left;while(pre.right!=null&&pre.right!=cur){pre=pre.right;}...
Binary Tree Level Order Traversal 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], 代码语言:javascript ...
Given preorder and inorder traversal of a tree, construct the binary tree. 二分法 复杂度 时间O(N^2) 空间 O(N) 思路 我们先考察先序遍历序列和中序遍历序列的特点。对于先序遍历序列,根在最前面,后面部分存在一个分割点,前半部分是根的左子树,后半部分是根的右子树。对于中序遍历序列,根在中间部分...
* TreeNode right; * TreeNode(int x) { val = x; } * } */publicclassSolution{public List<Integer>inorderTraversal(TreeNode root){ArrayList<Integer>result=newArrayList<Integer>();if(root==null)returnresult;inorderTraversal(root,result);returnresult;}privatevoidinorderTraversal(TreeNode root,Arra...
* TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */classSolution{public:vector<int>inorderTraversal(TreeNode*root){vector<int>result;traverse(root,result);returnresult;}private:voidtraverse(TreeNode*root,vector<int>&ret){if(root){...
Unfortunately, the .NET Framework does not contain a binary tree class, so in order to better understand binary trees, let's take a moment to create our own binary tree class. The First Step: Creating a Base Node Class The first step in designing our binary tree class is to create a ...