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<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>Example 1:</strong></p>
<pre>
<strong>Input:</strong> x = 123
<strong>Output:</strong> 321
</pre>
<p><strong>Example 2:</strong></p>
<pre>
<strong>Input:</strong> x = -123
<strong>Output:</strong> -321
</pre>
<p><strong>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>