Package g0901_1000.s0929_unique_email_addresses

Class Solution

java.lang.Object
g0901_1000.s0929_unique_email_addresses.Solution
public class Solution extends java.lang.Object
929 - Unique Email Addresses.

Easy

Every valid email consists of a local name and a domain name , separated by the '@' sign. Besides lowercase letters, the email may contain one or more '.' or '+'.

  • For example, in "[email protected]", "alice" is the local name , and "leetcode.com" is the domain name.

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. Note that this rule does not apply to 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. Note that this rule does not apply to domain names.

It is possible to use both of these rules at the same time.

Given an array of strings emails where we send one email to each emails[i], return the number of different addresses that actually receive mails.

Example 1:

Input: emails = [“[email protected]”,“[email protected]”,“[email protected]”]

Output: 2

Explanation: “[email protected]” and “[email protected]” actually receive mails.

Example 2:

Input: emails = [“[email protected]”,“[email protected]”,“[email protected]”]

Output: 3

Constraints:

  • 1 <= emails.length <= 100
  • 1 <= emails[i].length <= 100
  • emails[i] consist of lowercase English letters, '+', '.' and '@'.
  • Each emails[i] contains exactly one '@' character.
  • All local and domain names are non-empty.
  • Local names do not start with a '+' character.
  • Domain names end with the ".com" suffix.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    numUniqueEmails(java.lang.String[] emails)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • numUniqueEmails

      public int numUniqueEmails(java.lang.String[] emails)