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<p>You are given a very large integer <code>n</code>, represented as a string, and an integer digit <code>x</code>. The digits in <code>n</code> and the digit <code>x</code> are in the <strong>inclusive</strong> range <code>[1, 9]</code>, and <code>n</code> may represent a <b>negative</b> number.</p>
<p>You are given a very large integer <code>n</code>, represented as a string, and an integer digit <code>x</code>. The digits in <code>n</code> and the digit <code>x</code> are in the <strong>inclusive</strong> range <code>[1, 9]</code>, and <code>n</code> may represent a <b>negative</b> number.</p>
<p>You want to <strong>maximize </strong><code>n</code><strong>&#39;s numerical value</strong> by inserting <code>x</code> anywhere in the decimal representation of <code>n</code>. You <strong>cannot</strong> insert <code>x</code> to the left of the negative sign.</p>
<p>You want to <strong>maximize </strong><code>n</code><strong>&#39;s numerical value</strong> by inserting <code>x</code> anywhere in the decimal representation of <code>n</code>. You <strong>cannot</strong> insert <code>x</code> to the left of the negative sign.</p>
<ul>
<li>For example, if <code>n = 73</code> and <code>x = 6</code>, it would be best to insert it between <code>7</code> and <code>3</code>, making <code>n = 763</code>.</li>
<li>If <code>n = -55</code> and <code>x = 2</code>, it would be best to insert it before the first <code>5</code>, making <code>n = -255</code>.</li>
</ul>
<p>Return <em>a string representing the <strong>maximum</strong> value of </em><code>n</code><em> after the insertion</em>.</p>
<p>Return <em>a string representing the <strong>maximum</strong> value of </em><code>n</code><em> after the insertion</em>.</p>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
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<ul>
<li><code>1 &lt;= n.length &lt;= 10<sup>5</sup></code></li>
<li><code>1 &lt;= x &lt;= 9</code></li>
<li>The digits in <code>n</code> are in the range <code>[1, 9]</code>.</li>
<li>The digits in <code>n</code> are in the range <code>[1, 9]</code>.</li>
<li><code>n</code> is a valid representation of an integer.</li>
<li>In the case of a negative <code>n</code>, it will begin with <code>&#39;-&#39;</code>.</li>
<li>In the case of a negative <code>n</code>, it will begin with <code>&#39;-&#39;</code>.</li>
</ul>