【leetcode】929. Unique Email Addresses
题目如下:
Every email consists of a local name and a domain name, separated by the @ sign.
For example, in
alice@leetcode.com
,alice
is the local name, andleetcode.com
is the domain name.Besides lowercase letters, these emails may contain
'.'
s or'+'
s.If you add periods (
'.'
) between some characters in the local name part of an email address, mail sent there will be forwarded to the same address without dots in the local name. For example,"alice.z@leetcode.com"
and"alicez@leetcode.com"
forward to the same email address. (Note that this rule does not apply for domain names.)If you add a plus (
'+'
) in the local name, everything after the first plus sign will be ignored. This allows certain emails to be filtered, for examplem.y+name@email.com
will be forwarded tomy@email.com
. (Again, this rule does not apply for domain names.)It is possible to use both of these rules at the same time.
Given a list of
emails
, we send one email to each address in the list. How many different addresses actually receive mails?Example 1:
Input: ["test.email+alex@leetcode.com","test.e.mail+bob.cathy@leetcode.com","testemail+david@lee.tcode.com"]
Output: 2
Explanation: "testemail@leetcode.com" and "testemail@lee.tcode.com" actually receive mailsNote:
1 <= emails[i].length <= 100
1 <= emails.length <= 100
- Each
emails[i]
contains exactly one'@'
character.
解题思路:82%的通过率足以证明这题有多简单。把local name的 '.'替换成'',并且截断第一个'+'后面的内容即可。
代码如下:
class Solution(object):
def numUniqueEmails(self, emails):
"""
:type emails: List[str]
:rtype: int
"""
dic = {}
for i in emails:
e = i.split('@')
e[0] = e[0].replace('.','')
if '+' in e[0]:
e[0] = e[0][:e[0].index('+')]
if e[0] + '@' + e[1] not in dic:
dic[e[0] + '@' + e[1]] = 1
#print dic
return len(dic)
【leetcode】929. Unique Email Addresses的更多相关文章
- 【LeetCode】929. Unique Email Addresses 解题报告(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 set + 字符串操作 参考资料 日期 题目地址:h ...
- 【Leetcode_easy】929. Unique Email Addresses
problem 929. Unique Email Addresses solution: class Solution { public: int numUniqueEmails(vector< ...
- 929. Unique Email Addresses
929. Unique Email Addresses Easy 22766FavoriteShare Every email consists of a local name and a domai ...
- 【LeetCode】95. Unique Binary Search Trees II 解题报告(Python)
[LeetCode]95. Unique Binary Search Trees II 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzh ...
- [leetcode] 929. Unique Email Addresses (easy)
统计有几种邮箱地址. 邮箱名类型:local@domain 规则:1. local中出现"."的,忽略. a.bc=abc 2. local中出现"+"的,+以 ...
- [LeetCode] 929. Unique Email Addresses 独特的邮件地址
Every email consists of a local name and a domain name, separated by the @ sign. For example, in ali ...
- [LeetCode] 929. Unique Email Addresses 唯一的电邮地址
Every email consists of a local name and a domain name, separated by the @ sign. For example, in ali ...
- LeetCode 929.Unique Email Addresses
Description Every email consists of a local name and a domain name, separated by the @ sign. For exa ...
- LeetCode 929 Unique Email Addresses 解题报告
题目要求 Every email consists of a local name and a domain name, separated by the @ sign. For example, i ...
随机推荐
- SQL Server 创建表
SQL Server 创建表 我们在上一节中完成了数据库的创建,在本节,我们要往这个新的数据库中加入点数据,要想将数据添加到数据库,我们就必须在数据库中添加一个表,接下来来看看具体的操作. 我们的数据 ...
- Delphi fmx 找不到android设备解决办法
刚接触到移动开发,很多不熟悉.配置好Android SDK后,如果用模拟器来调试程序的话,那速度会让人崩溃,我用的Nexus7平板,插上电脑,开启USB调试,但奇怪在Delphi里就是找不到 ...
- Struts2基础-4 -struts拦截器
Struts2拦截器工作原理 拦截器围绕着 Action和 Result的执行而执行. Struts2拦截器的工作方式如图10.2所示.从上图中可以看出, Struts2拦截器的实现原理和 Servl ...
- .Net Core 使用 Swagger 提供API文档
1.运行环境 开发工具:Visual Studio 2017 JDK版本:.NET Core 2.0 项目管理工具:nuget 2.GITHUB地址 https://github.com/nbfujx ...
- 超全Altium Designer16 总结--Altium Designer
原址:http://blog.csdn.net/qq_29350001/article/details/52199356 以前是使用DXP2004来画图的,后来转行.想来已经有一年半的时间没有画过了. ...
- AcWing 260. 买票 (树状数组+二分)打卡
题目:https://www.acwing.com/problem/content/description/262/ 题意:给定一个队伍,每个人过来的时候可以插队,每个人会输入一个插入到哪个位置,但是 ...
- oo_project_1
Project 1题目要求分析: 实现多项式的加减运算,主要问题是解决输入格式的判断问题. 输入实例: {(3,0), (2,2), (12,3)} + {(3,1), (-5,3)} – {(-19 ...
- 开启关闭mysql服务
1.Windows下 启动服务 mysqld --console 或 net start mysql 关闭服务 mysqladmin -uroot shudown 或 net stop mysql ...
- python 装饰器 第四步:基本装饰器的实现
#第四步:基本装饰器的实现 #用于扩展基本函数的函数 def kuozhan(func): #内部函数(扩展之后的eat函数) def neweat(): #以下三步就是扩展之后的功能,于是我们把这三 ...
- String的replace导致内存溢出
从一次内存溢出来看JDK的String应该怎么用 背景 JDK在String类中给我们提供的API,replace是个使用频率很高的的方法.因为他可以对字符串内容进行替换,只需要输入替换字符串和被替换 ...