Title: N 叉树的前序遍历(N-ary Tree Preorder Traversal)

[github-actions]

Difficulty: Easy
Tags: 栈(Stack)、树(Tree)、深度优先搜索(Depth-First Search)
Link: https://leetcode.com/problems/n-ary-tree-preorder-traversal
LinkCN: https://leetcode.cn/problems/n-ary-tree-preorder-traversal