mirror-distance-of-an-integer

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Algorithms

You are given an integer <code>n</code>.

Define its mirror distance as: <code>abs(n - reverse(n))</code>​​​​​​​ where <code>reverse(n)</code> is the integer formed by reversing the digits of <code>n</code>.

Return an integer denoting the mirror distance of <code>n</code>​​​​​​​.

<code>abs(x)</code> denotes the absolute value of <code>x</code>.

&nbsp;
Example 1:

<div class="example-block">
Input: n = 25

Output: 27

Explanation:

<ul>
	<li><code>reverse(25) = 52</code>.</li>
	<li>Thus, the answer is <code>abs(25 - 52) = 27</code>.</li>
</ul>
</div>

Example 2:

<div class="example-block">
Input: n = 10

Output: 9

Explanation:

<ul>
	<li><code>reverse(10) = 01</code> which is 1.</li>
	<li>Thus, the answer is <code>abs(10 - 1) = 9</code>.</li>
</ul>
</div>

Example 3:

<div class="example-block">
Input: n = 7

Output: 0

Explanation:

<ul>
	<li><code>reverse(7) = 7</code>.</li>
	<li>Thus, the answer is <code>abs(7 - 7) = 0</code>.</li>
</ul>
</div>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= n &lt;= 109</code></li>
</ul>