当前节点更新为当前节点的右孩子。 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<int> preorderTraversal(TreeNode *root) ...
vector<int> preorderTraversal(TreeNode* root) { // write code here vector <int> res; stack<TreeNode*> s; if (root==NULL){ return res; } s.push(root); while (!s.empty()) { TreeNode *cur=s.top(); s.pop(); res.push_back(cur->val); if (cur->right!=NULL) s.push(cur...
Given the root of an n-ary tree, return the preorder traversal of its nodes' values. Nary-Tree input serialization is represented in their level order traversal. Each group of children is separated by the null value (See examples) 给定一个 n 叉树的根节点 root ,返回 其节点值的 前序遍历...
/** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Solution { public: vector<int> preorderTraversal(TreeNode *root) { vector<int> res; stack<TreeNode...
1. 前序遍历: 144. 二叉树的前序遍历递归def preorderTraversal(self, root): res=[] def helper(root): if not root: return res.append(root.val) helper(root.left) helper(root.right) helper(root) return r…
题目: Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 根据前序遍历和中序遍历结果构造二叉树。 思路分析: 分析二叉树前序遍历和中序遍历的结果我们发现: 二叉树前序遍历的第一个节点是根节点。 在中序遍历...
https://leetcode.cn/problems/construct-binary-tree-from-preorder-and-inorder-traversal/ 给定两个整数数组preorder和inorder,其中preorder是二叉树的先序遍历,inorder是同一棵树的中序遍历,请构造二叉树并返回其根节点。 示例1: 输入: preorder = [3,9,20,15,7], inorder = [9,3,15,20,7] ...
145Binary Tree Postorder TraversalC 144Binary Tree Preorder TraversalC++ 143Reorder ListC 142Linked List Cycle IIC 141Linked List CycleC 140Word Break II 139Word BreakC++ 138Copy List with Random PointerC 137Single Number II 136Single NumberC ...
ConstructBinaryTreefromPreorderandInorderTraversal Jan 30, 2015 ContainerWithMostWater.java Container With Most Water Dec 21, 2014 ConvertSortedArraytoBinarySearchTree.java add inorder solution Jan 29, 2015 ConvertSortedListtoBinarySearchTree.java ...
HTTPSSSHSVNSVN+SSH下载ZIP 该操作需登录 Gitee 帐号,请先登录后再操作。 立即登录没有帐号,去注册 提示 下载代码请复制以下命令到终端执行 为确保你提交的代码身份被 Gitee 正确识别,请执行以下命令完成配置 git config --global user.name userName git config --global user.email userEmail ...