【题目】

  • Total Accepted: 10330
  • Total Submissions: 24061
  • Difficulty: Easy
  • Contributors: Admin

A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom represent the minutes (0-59).

Each LED represents a zero or one, with the least significant bit on the right.

For example, the above binary watch reads "3:25".

Given a non-negative integer n which represents the number of LEDs that are currently on, return all possible times the watch could represent.

Example:

Input: n = 1
Return: ["1:00", "2:00", "4:00", "8:00", "0:01", "0:02", "0:04", "0:08", "0:16", "0:32"]

Note:

  • The order of output does not matter.
  • The hour must not contain a leading zero, for example "01:00" is not valid, it should be "1:00".
  • The minute must be consist of two digits and may contain a leading zero, for example "10:2" is not valid, it should be "10:02".

【解答】

【2016/10/31】考察combination，复习了backtracking的内容，但还是没写出来。。。

401. Binary Watch的更多相关文章

  1. 27. leetcode 401. Binary Watch

    A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom ...

  2. [LeetCode&Python] Problem 401. Binary Watch

    A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom ...

  3. 401. Binary Watch 回溯

    A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom ...

  4. [LeetCode] 401. Binary Watch 二进制表

    A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom ...

  5. 【LeetCode】401. Binary Watch 解题报告（Java & Python）

    作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 java解法 Python解法 日期 [LeetCo ...

  6. [leetcode] 401. Binary Watch

    https://leetcode.com/contest/5/problems/binary-watch/ 这个题应该是这次最水的,这个题目就是二进制,然后是10位,最大1024,然后遍历,找二进制里 ...

  7. 401 Binary Watch 二进制手表

    详见:https://leetcode.com/problems/binary-watch/description/ C++: class Solution { public: vector<s ...

  8. LeetCode_401. Binary Watch

    401. Binary Watch Easy A binary watch has 4 LEDs on the top which represent the hours (0-11), and th ...

  9. LeetCode All in One 题目讲解汇总(持续更新中...)

    终于将LeetCode的免费题刷完了,真是漫长的第一遍啊,估计很多题都忘的差不多了,这次开个题目汇总贴,并附上每道题目的解题连接,方便之后查阅吧~ 477 Total Hamming Distance ...

随机推荐

  1. Ubuntu下的Notepad++：Notepadqq

    http://www.linuxidc.com/Linux/2015-07/120678.htm 适合从Win平台转移到Linux平台的用户,如果你之前一直再Win下使用nodepad++, 推荐你再 ...

  2. spring-事物-jdbc-hibernate

  3. Fluent API 配置

    EF里实体关系配置的方法,有两种: Data Annotation方式配置 也可以 Fluent API 方式配置 Fluent API 配置的方法 EF里的实体关系 Fluent API 配置分为H ...

  4. Hibernate映射文件创建和删除触发器，存储过程等数据库对象

    创建表,触发器,和存储过程等数据库对象,这里一定要用create 在hibernate.cfg.xml文件中

  5. OC中字符串的提取与替换-四种不同方法实现

    /* 1.将可变字符串 @"When I was young, I loved a girl in neighbor class."中,从 young提取到girl.替换 成@&q ...

  6. validate插件深入学习-04自定义验证方法

    自定义验证方法 jQuery.validator.addMethod(name,method,[,message]) name: 方法名 method: function(value,element, ...

  7. iOS - CoreLocation 定位

    前言 NS_CLASS_AVAILABLE(10_6, 2_0) @interface CLLocationManager : NSObject 1.CoreLocation 定位 配置 1.在 iO ...

  8. DNS域名解析服务器

    域名解析服务器,靠它把你要访问的网址找到然后把信息送到你电脑上.DNS 是域名系统 (Domain Name System) 的缩写,它是由解析器和域名服务器组成的.域名服务器是指保存有该网络中所有主 ...

  9. iOS runtime 初步学习

    注: 在Xocde5之后, 使用运行时方法需要进行2步设置1. 在Build Setting中搜索'msg', 设置'Strict Checking' 为 NO2. 使用需要导入头文件 #import ...

  10. property内存管理策略

    1普通数据,用weak 2delegate,用weak 3一般对象,用strong 4NSString,用copy 5block,用copy