Every email consists of a local name and a domain name, separated by the @ sign.<\/p>\n
For example, in\u00a0 Besides lowercase letters, these emails may contain\u00a0 If you add periods ( If you add a plus ( It is possible to use both of these rules at the same time.<\/p>\n Given a list of\u00a0 <\/p>\n Example 1:<\/strong><\/p>\n <\/p>\n Note:<\/strong><\/p>\n Python<\/strong><\/p>\nalice@leetcode.com<\/code>,\u00a0alice<\/code>\u00a0is the local name, and\u00a0leetcode.com<\/code>\u00a0is the domain name.<\/p>\n'.'<\/code>s or\u00a0'+'<\/code>s.<\/p>\n'.'<\/code>) between some characters in the\u00a0local name<\/strong>\u00a0part of an email address, mail sent there will be forwarded to the same address without dots in the local name.\u00a0 For example,\u00a0\"alice.z@leetcode.com\"<\/code>\u00a0and\u00a0\"alicez@leetcode.com\"<\/code>\u00a0forward to the same email address.\u00a0 (Note that this rule does not apply for domain names.)<\/p>\n'+'<\/code>) in the\u00a0local name<\/strong>, everything after the first plus sign will be\u00a0ignored<\/strong>. This allows certain emails to be filtered, for example\u00a0m.y+name@email.com<\/code>\u00a0will be forwarded to\u00a0my@email.com<\/code>.\u00a0 (Again, this rule does not apply for domain names.)<\/p>\nemails<\/code>, we send one email to each address in the list.\u00a0\u00a0How many different addresses actually receive mails?<\/p>\nInput: <\/strong>[\"test.email+alex@leetcode.com\",\"test.e.mail+bob.cathy@leetcode.com\",\"testemail+david@lee.tcode.com\"]<\/span>\r\nOutput: <\/strong>2<\/span>\r\nExplanation:<\/strong>\u00a0\"testemail@leetcode.com\" and \"testemail@lee.tcode.com\" <\/span>actually receive mails\r\n<\/pre>\n\n
1 <= emails[i].length\u00a0<= 100<\/code><\/li>\n1 <= emails.length <= 100<\/code><\/li>\nemails[i]<\/code>\u00a0contains exactly one\u00a0'@'<\/code>\u00a0character.<\/li>\n<\/ul>\n<\/div>\n \r\nclass Solution(object):\r\n def numUniqueEmails(self, emails):\r\n """\r\n :type emails: List[str]\r\n :rtype: int\r\n """\r\n d = {}\r\n for email in emails:\r\n a = email.split("@")\r\n b = a[0].split("+")\r\n c = b[0].replace(".", "")\r\n d[c+a[1]] = 1\r\n return len(d)\r\n \r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"