You are given a string s consisting only of uppercase English letters.
You can apply some operations to this string where, in one operation, you can remove any occurrence of one of the substrings "AB" or "CD" from s.
Return the minimum possible length of the resulting string that you can obtain.
\n\nNote that the string concatenates after removing the substring and could produce new "AB" or "CD" substrings.
\n
Example 1:
\n\n\nInput: s = "ABFCACDB"\nOutput: 2\nExplanation: We can do the following operations:\n- Remove the substring "ABFCACDB", so s = "FCACDB".\n- Remove the substring "FCACDB", so s = "FCAB".\n- Remove the substring "FCAB", so s = "FC".\nSo the resulting length of the string is 2.\nIt can be shown that it is the minimum length that we can obtain.\n\n
Example 2:
\n\n\nInput: s = "ACBBD"\nOutput: 5\nExplanation: We cannot do any operations on the string so the length remains the same.\n\n\n
\n
Constraints:
\n\n1 <= s.length <= 100s consists only of uppercase English letters.给你一个仅由 大写 英文字符组成的字符串 s 。
你可以对此字符串执行一些操作，在每一步操作中，你可以从 s 中删除 任一个 \"AB\" 或 \"CD\" 子字符串。
通过执行操作，删除所有 \"AB\" 和 \"CD\" 子串，返回可获得的最终字符串的 最小 可能长度。
注意，删除子串后，重新连接出的字符串可能会产生新的 \"AB\" 或 \"CD\" 子串。
\n\n
示例 1：
\n\n\n输入：s = \"ABFCACDB\"\n输出：2\n解释：你可以执行下述操作：\n- 从 \"ABFCACDB\" 中删除子串 \"AB\"，得到 s = \"FCACDB\" 。\n- 从 \"FCACDB\" 中删除子串 \"CD\"，得到 s = \"FCAB\" 。\n- 从 \"FCAB\" 中删除子串 \"AB\"，得到 s = \"FC\" 。\n最终字符串的长度为 2 。\n可以证明 2 是可获得的最小长度。\n\n
示例 2：
\n\n\n输入：s = \"ACBBD\"\n输出：5\n解释：无法执行操作，字符串长度不变。\n\n\n
\n\n
提示：
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"style": "LEETCODE",
"exampleTestcases": "\"ABFCACDB\"\n\"ACBBD\"",
"__typename": "QuestionNode"
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