#include<stdio.h>//此法占用内存和时间,但可以AC #include<stdlib.h> int a[1000000]; int cmp(const void *a,const void *b) { return *(int *)b-*(int *)a; } int main() { int s; scanf("%d",&s); while(s--) { int n
文章目录 一、题目二、题解 一、题目 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 gro
589. N 叉树的前序遍历 java1:stack栈:没看懂 class Solution {public List<Integer> preorder(Node root) {List<Integer> res = new ArrayList<Integer>();if (root == null) {return res;}Map<Node, Integer> map = new Has