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"content": "<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>\n\n<ul>\n\t<li>Remove substring <code>"ab"</code> and gain <code>x</code> points.\n\n\t<ul>\n\t\t<li>For example, when removing <code>"ab"</code> from <code>"c<u>ab</u>xbae"</code> it becomes <code>"cxbae"</code>.</li>\n\t</ul>\n\t</li>\n\t<li>Remove substring <code>"ba"</code> and gain <code>y</code> points.\n\t<ul>\n\t\t<li>For example, when removing <code>"ba"</code> from <code>"cabx<u>ba</u>e"</code> it becomes <code>"cabxe"</code>.</li>\n\t</ul>\n\t</li>\n</ul>\n\n<p>Return <em>the maximum points you can gain after applying the above operations on</em> <code>s</code>.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "cdbcbbaaabab", x = 4, y = 5\n<strong>Output:</strong> 19\n<strong>Explanation:</strong>\n- Remove the "ba" underlined in "cdbcbbaaa<u>ba</u>b". Now, s = "cdbcbbaaab" and 5 points are added to the score.\n- Remove the "ab" underlined in "cdbcbbaa<u>ab</u>". Now, s = "cdbcbbaa" and 4 points are added to the score.\n- Remove the "ba" underlined in "cdbcb<u>ba</u>a". Now, s = "cdbcba" and 5 points are added to the score.\n- Remove the "ba" underlined in "cdbc<u>ba</u>". Now, s = "cdbc" and 5 points are added to the score.\nTotal score = 5 + 4 + 5 + 5 = 19.</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "aabbaaxybbaabb", x = 5, y = 4\n<strong>Output:</strong> 20\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= s.length <= 10<sup>5</sup></code></li>\n\t<li><code>1 <= x, y <= 10<sup>4</sup></code></li>\n\t<li><code>s</code> consists of lowercase English letters.</li>\n</ul>\n",
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"You can use a stack to handle erasures"
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