929. Unique Email Addresses

[LeedCode] 929. Unique Email Addresses 파이썬 (Easy)

문제 929. Unique Email Addresses 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 "alice@leetcode.com", "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 ..