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+<h2><a href="https://leetcode.com/problems/restore-ip-addresses/">93. Restore IP Addresses</a></h2><h3>Medium</h3><hr><div><p>A <strong>valid IP address</strong> consists of exactly four integers separated by single dots. Each integer is between <code>0</code> and <code>255</code> (<strong>inclusive</strong>) and cannot have leading zeros.</p>
+
+<ul>
+	<li>For example, <code>"0.1.2.201"</code> and <code>"192.168.1.1"</code> are <strong>valid</strong> IP addresses, but <code>"0.011.255.245"</code>, <code>"192.168.1.312"</code> and <code>"[email protected]"</code> are <strong>invalid</strong> IP addresses.</li>
+</ul>
+
+<p>Given a string <code>s</code> containing only digits, return <em>all possible valid IP addresses that can be formed by inserting dots into </em><code>s</code>. You are <strong>not</strong> allowed to reorder or remove any digits in <code>s</code>. You may return the valid IP addresses in <strong>any</strong> order.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre><strong>Input:</strong> s = "25525511135"
+<strong>Output:</strong> ["255.255.11.135","255.255.111.35"]
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre><strong>Input:</strong> s = "0000"
+<strong>Output:</strong> ["0.0.0.0"]
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre><strong>Input:</strong> s = "101023"
+<strong>Output:</strong> ["1.0.10.23","1.0.102.3","10.1.0.23","10.10.2.3","101.0.2.3"]
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= s.length &lt;= 20</code></li>
+	<li><code>s</code> consists of digits only.</li>
+</ul>
+</div>