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0007-reverse-integer/README.md

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+<h2><a href="https://leetcode.com/problems/reverse-integer">7. Reverse Integer</a></h2><h3>Medium</h3><hr><p>Given a signed 32-bit integer <code>x</code>, return <code>x</code><em> with its digits reversed</em>. If reversing <code>x</code> causes the value to go outside the signed 32-bit integer range <code>[-2<sup>31</sup>, 2<sup>31</sup> - 1]</code>, then return <code>0</code>.</p>
+
+<p><strong>Assume the environment does not allow you to store 64-bit integers (signed or unsigned).</strong></p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> x = 123
+<strong>Output:</strong> 321
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> x = -123
+<strong>Output:</strong> -321
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> x = 120
+<strong>Output:</strong> 21
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>-2<sup>31</sup> &lt;= x &lt;= 2<sup>31</sup> - 1</code></li>
+</ul>