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+<h2>740. Delete and Earn</h2><h3>Medium</h3><hr><div><p>Given an array <code>nums</code> of integers, you can perform operations on the array.</p>
+
+<p>In each operation, you pick any <code>nums[i]</code> and delete it to earn <code>nums[i]</code> points. After, you must delete <b>every</b> element equal to <code>nums[i] - 1</code> or <code>nums[i] + 1</code>.</p>
+
+<p>You start with <code>0</code> points. Return the maximum number of points you can earn by applying such operations.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre><strong>Input:</strong> nums = [3,4,2]
+<strong>Output:</strong> 6
+<strong>Explanation:</strong> Delete 4 to earn 4 points, consequently 3 is also deleted.
+Then, delete 2 to earn 2 points.
+6 total points are earned.
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre><strong>Input:</strong> nums = [2,2,3,3,3,4]
+<strong>Output:</strong> 9
+<strong>Explanation:</strong> Delete 3 to earn 3 points, deleting both 2's and the 4.
+Then, delete 3 again to earn 3 points, and 3 again to earn 3 points.
+9 total points are earned.
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= nums.length &lt;= 2 * 10<sup>4</sup></code></li>
+	<li><code>1 &lt;= nums[i] &lt;= 10<sup>4</sup></code></li>
+</ul>
+</div>