Class Solution
java.lang.Object
g0901_1000.s0929_unique_email_addresses.Solution
929 - Unique Email Addresses.<p>Easy</p>
<p>Every <strong>valid email</strong> consists of a <strong>local name</strong> and a <strong>domain name</strong> , separated by the <code>'@'</code> sign. Besides lowercase letters, the email may contain one or more <code>'.'</code> or <code>'+'</code>.</p>
<ul>
<li>For example, in <code>"[email protected]"</code>, <code>"alice"</code> is the <strong>local name</strong> , and <code>"leetcode.com"</code> is the <strong>domain name</strong>.</li>
</ul>
<p>If you add periods <code>'.'</code> between some characters in the <strong>local name</strong> 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 <strong>does not apply</strong> to <strong>domain names</strong>.</p>
<ul>
<li>For example, <code>"[email protected]"</code> and <code>"[email protected]"</code> forward to the same email address.</li>
</ul>
<p>If you add a plus <code>'+'</code> in the <strong>local name</strong> , everything after the first plus sign <strong>will be ignored</strong>. This allows certain emails to be filtered. Note that this rule <strong>does not apply</strong> to <strong>domain names</strong>.</p>
<ul>
<li>For example, <code>"[email protected]"</code> will be forwarded to <code>"[email protected]"</code>.</li>
</ul>
<p>It is possible to use both of these rules at the same time.</p>
<p>Given an array of strings <code>emails</code> where we send one email to each <code>emails[i]</code>, return <em>the number of different addresses that actually receive mails</em>.</p>
<p><strong>Example 1:</strong></p>
<p><strong>Input:</strong> emails = [“[email protected]”,“[email protected]”,“[email protected]”]</p>
<p><strong>Output:</strong> 2</p>
<p><strong>Explanation:</strong> “[email protected]” and “[email protected]” actually receive mails.</p>
<p><strong>Example 2:</strong></p>
<p><strong>Input:</strong> emails = [“[email protected]”,“[email protected]”,“[email protected]”]</p>
<p><strong>Output:</strong> 3</p>
<p><strong>Constraints:</strong></p>
<ul>
<li><code>1 <= emails.length <= 100</code></li>
<li><code>1 <= emails[i].length <= 100</code></li>
<li><code>emails[i]</code> consist of lowercase English letters, <code>'+'</code>, <code>'.'</code> and <code>'@'</code>.</li>
<li>Each <code>emails[i]</code> contains exactly one <code>'@'</code> character.</li>
<li>All local and domain names are non-empty.</li>
<li>Local names do not start with a <code>'+'</code> character.</li>
<li>Domain names end with the <code>".com"</code> suffix.</li>
</ul>
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Constructor Summary
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Solution
public Solution()
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Method Details
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numUniqueEmails
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