{"id":11,"date":"2018-10-29T19:18:09","date_gmt":"2018-10-29T19:18:09","guid":{"rendered":"https:\/\/andybase.com\/?p=11"},"modified":"2018-11-27T14:34:59","modified_gmt":"2018-11-27T14:34:59","slug":"unique-email-addresses","status":"publish","type":"post","link":"https:\/\/andybase.com\/?p=11","title":{"rendered":"929. Unique Email Addresses"},"content":{"rendered":"\n<p>Link: <a href=\"https:\/\/leetcode.com\/problems\/unique-email-addresses\/\">Unique Email Addresses <\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Thought<\/h2>\n\n\n\n<p><strong>Brutal Force Solution<br><\/strong>This question is pretty simple (and it actually is an esay one). A naive approache is, split the name and domain.<\/p>\n\n\n\n<p>For the name, <strong>remove every thing after first &#8216;+&#8217;<\/strong>, and then replace all &#8216;.&#8217; as empty. For the domain, just keep it is.<\/p>\n\n\n\n<p>Then, use a set to make sure every thing is unique. After processed all emails, count the length of the set.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Code<\/h2>\n\n\n\n<pre class=\"wp-block-syntaxhighlighter-code brush: python; notranslate\">class Solution:\n    def numUniqueEmails(self, emails):\n        \"\"\"\n        :type emails: List[str]\n        :rtype: int\n        \"\"\"\n        hist = set()\n        cnt = 0\n        for email in emails:\n            name, domain = email.split('@')\n            name = name.split('+')[0]\n            name=name.replace('.', '')\n            if name + '@' + domain not in hist:\n                hist.add(name+'@'+domain)\n                cnt += 1\n        return cnt<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Runtime<\/h2>\n\n\n\n<p>Time: O(n)<br>Space: O(n)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Link: Unique Email Addresses Thought Brutal Force SolutionThis question is pretty simple (and it actually is an esay one). A [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[2],"tags":[4,3],"class_list":["post-11","post","type-post","status-publish","format-standard","hentry","category-leetcode","tag-contest","tag-leetcode"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paWPni-b","_links":{"self":[{"href":"https:\/\/andybase.com\/index.php?rest_route=\/wp\/v2\/posts\/11","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/andybase.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/andybase.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/andybase.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/andybase.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11"}],"version-history":[{"count":5,"href":"https:\/\/andybase.com\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions"}],"predecessor-version":[{"id":77,"href":"https:\/\/andybase.com\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions\/77"}],"wp:attachment":[{"href":"https:\/\/andybase.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/andybase.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/andybase.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}