386. 字典序排数 给定一个整数 n, 返回从 1 到 n 的字典顺序. 例如, 给定 n =1 3,返回 [1,10,11,12,13,2,3,4,5,6,7,8,9] . 请尽可能的优化算法的时间复杂度和空间复杂度. 输入的数据 n 小于等于 5,000,000. 通过次数6,670提交次数9,748 class Solution { void reversalTree2(int root, int n, ArrayList<Integer> list) { list.add(root)
[LeetCode]386. Lexicographical Numbers 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/lexicographical-numbers/description/ 题目描述: Given an integer n, return 1 - n in lexicogra
用DFS来做,先弄开头是1的,再弄开头是1的里面开头是1的,再开头是1的里面开头是1的里的开头是1的,再... 是吧-- 比N大了BREAK就行. 注意第一个循环是1-9,往后的循环是0-9. public class Solution { public List<Integer> lexicalOrder(int n) { List<Integer> res = new ArrayList<>(); for(int i = 1; i < 10; i++) { h
C. Tram time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output The tram in Berland goes along a straight line from the point 0 to the point s and back, passing 1 meter per t1 seconds in both direc
［抄题］: Given an integer n, return 1 - n in lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]. Please optimize your algorithm to use less time and space. The input size may be as large as 5,000,000. [暴力解法]: 时间分析: 空间分
Given an integer n, return 1 - n in lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]. Please optimize your algorithm to use less time and space. The input size may be as large as 5,000,000. 按字典序求所给范围数字列表 回溯,dfs cl
