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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>
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<p><strong>Assume the environment does not allow you to store 64-bit integers (signed or unsigned).</strong></p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> x = 123
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<strong>Output:</strong> 321
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> x = -123
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<strong>Output:</strong> -321
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</pre>
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<p><strong>Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> x = 120
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<strong>Output:</strong> 21
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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	<li><code>-2<sup>31</sup> <= x <= 2<sup>31</sup> - 1</code></li>
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</ul>
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