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leetcode/problem/defanging-an-ip-address.html
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<p>Given a valid (IPv4) IP <code>address</code>, return a defanged version of that IP address.</p>
<p>A <em>defanged&nbsp;IP address</em>&nbsp;replaces every period <code>&quot;.&quot;</code> with <code>&quot;[.]&quot;</code>.</p>
<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>
<pre><strong>Input:</strong> address = "1.1.1.1"
<strong>Output:</strong> "1[.]1[.]1[.]1"
</pre><p><strong>Example 2:</strong></p>
<pre><strong>Input:</strong> address = "255.100.50.0"
<strong>Output:</strong> "255[.]100[.]50[.]0"
</pre>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>
<ul>
<li>The given <code>address</code> is a valid IPv4 address.</li>
<p>Given a valid (IPv4) IP <code>address</code>, return a defanged version of that IP address.</p>
<p>A <em>defanged&nbsp;IP address</em>&nbsp;replaces every period <code>&quot;.&quot;</code> with <code>&quot;[.]&quot;</code>.</p>
<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>
<pre><strong>Input:</strong> address = "1.1.1.1"
<strong>Output:</strong> "1[.]1[.]1[.]1"
</pre><p><strong>Example 2:</strong></p>