vector<int> postorder(Node* root) { vector<int> order = {}; map<Node*, bool> visit; stack<Node*> nodeStack; if (root) { nodeStack.push(root); } while (!nodeStack.empty()) { Node* node = nodeStack.top(); int num = node->children.size(); if (num > 0 && visit.find(node...
LeetCode题解之N-ary Tree Postorder Traversal 1、题目描述 2、问题分析 递归。 3、代码 1vector<int> postorder(Node*root) {2vector<int>v;3postNorder(root, v);4returnv;5}67voidpostNorder(Node *root, vector<int> &v)8{9if(root ==NULL)10return;11for(auto it = root->children.begin();...
题目地址:https://leetcode.com/problems/n-ary-tree-postorder-traversal/description/ 题目描述 Given an n-ary tree, return the postorder traversal of its nodes’ values. For example, given a 3-ary tree: Return its postorder traversal as: [5,6,3,2,4,1]. Note: Recursive solution is trivial...
589. N-ary Tree Preorder Traversal(python+cpp) 题目: Given an n-ary tree, return the preorder traversal of its nodes’ values. 解释: N叉树的前序遍历。 python代码: c++代码: 总结: 和二叉树的前序遍历差不多,只是需要用for循环写出来。...LeetCode 589. N-ary Tree Preorder Traversal-多...
590. N-ary Tree Postorder Traversal* https://leetcode.com/problems/n-ary-tree-postorder-traversal/ 题目描述 Given an n-ary tree, return the postorder traversal of its nodes’ values. Nary-Tree input serialization is represented in their level order traversal, each group of chil...
[Leetcode]:589:N-ary Tree Preorder Traversal 题目: Given an n-ary tree, return the preorder traversal of its nodes’ values.即树的层序遍历。 解题: 注意递归。 代码: """ # Definition for a Node. class Node(object): def __init__(self, val, children): self.val = val self.children...
今天介绍的是LeetCode算法题中Easy级别的第136题(顺位题号是590)。给定一个n-ary树,返回其节点值的后序遍历。例如,给定一个3-ary树: 1 / | \ 3 2 4 / \ 5 6 其后序遍历结果为:[5,6,3,2,4,1]。 注意:递归解决方案是微不足道的,你可以用迭代的方式做吗? 本次解题使用的开发工具是eclipse,jd...
Solution{public:vector<int>postorder(Node*root){vector<int>ret;if(!root)returnret;stack<Node*>s;s.push(root);Node*cur;while(!s.empty()){cur=s.top();s.pop();ret.insert(ret.begin(),cur->val);for(inti=0;i<cur->children.size();++i){if(cur->children[i])s.push(cur->children...
[LeetCode] 590. N-ary Tree Postorder Traversal Easy Given an n-ary tree, return thepostordertraversal of its nodes' values. For example, given a3-arytree: Return its postorder traversal as:[5,6,3,2,4,1]. Note: Recursive solution is trivial, could you do it iteratively?
Binary Tree Traversal Binary Tree Reconstruction(leetcode可用) Polish Notation/Reverse Polish Notation N-ary Tree 什么是树(Tree),树的概念是什么 https://www.geeksforgeeks.org/binary-tree-set-1-introduction/www.geeksforgeeks.org/binary-tree-set-1-introduction/ ...