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+<h2><a href="https://leetcode.com/problems/alternating-digit-sum/">2544. Alternating Digit Sum</a></h2><h3>Easy</h3><hr><p>You are given a positive integer <code>n</code>. Each digit of <code>n</code> has a sign according to the following rules:</p>
+
+<ul>
+	<li>The <strong>most significant digit</strong> is assigned a <strong>positive</strong> sign.</li>
+	<li>Each other digit has an opposite sign to its adjacent digits.</li>
+</ul>
+
+<p>Return <em>the sum of all digits with their corresponding sign</em>.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 521
+<strong>Output:</strong> 4
+<strong>Explanation:</strong> (+5) + (-2) + (+1) = 4.
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 111
+<strong>Output:</strong> 1
+<strong>Explanation:</strong> (+1) + (-1) + (+1) = 1.
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 886996
+<strong>Output:</strong> 0
+<strong>Explanation:</strong> (+8) + (-8) + (+6) + (-9) + (+9) + (-6) = 0.
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n &lt;= 10<sup>9</sup></code></li>
+</ul>
+
+<p>&nbsp;</p>
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