<h2><a href="https://leetcode.com/problems/maximum-score-from-removing-substrings/">1717. Maximum Score From Removing Substrings</a></h2><h3>Medium</h3><hr><div><p>You are given a string <code>s</code> and two integers <code>x</code> and <code>y</code>. You can perform two types of operations any number of times.</p>

<ul>
	<li>Remove substring <code>"ab"</code> and gain <code>x</code> points.

	<ul>
		<li>For example, when removing <code>"ab"</code> from <code>"c<u>ab</u>xbae"</code> it becomes <code>"cxbae"</code>.</li>
	</ul>
	</li>
	<li>Remove substring <code>"ba"</code> and gain <code>y</code> points.
	<ul>
		<li>For example, when removing <code>"ba"</code> from <code>"cabx<u>ba</u>e"</code> it becomes <code>"cabxe"</code>.</li>
	</ul>
	</li>
</ul>

<p>Return <em>the maximum points you can gain after applying the above operations on</em> <code>s</code>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre><strong>Input:</strong> s = "cdbcbbaaabab", x = 4, y = 5
<strong>Output:</strong> 19
<strong>Explanation:</strong>
- Remove the "ba" underlined in "cdbcbbaaa<u>ba</u>b". Now, s = "cdbcbbaaab" and 5 points are added to the score.
- Remove the "ab" underlined in "cdbcbbaa<u>ab</u>". Now, s = "cdbcbbaa" and 4 points are added to the score.
- Remove the "ba" underlined in "cdbcb<u>ba</u>a". Now, s = "cdbcba" and 5 points are added to the score.
- Remove the "ba" underlined in "cdbc<u>ba</u>". Now, s = "cdbc" and 5 points are added to the score.
Total score = 5 + 4 + 5 + 5 = 19.</pre>

<p><strong class="example">Example 2:</strong></p>

<pre><strong>Input:</strong> s = "aabbaaxybbaabb", x = 5, y = 4
<strong>Output:</strong> 20
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= s.length &lt;= 10<sup>5</sup></code></li>
	<li><code>1 &lt;= x, y &lt;= 10<sup>4</sup></code></li>
	<li><code>s</code> consists of lowercase English letters.</li>
</ul>
</div>