{ "data": { "question": { "questionId": "2800", "questionFrontendId": "2696", "boundTopicId": null, "title": "Minimum String Length After Removing Substrings", "titleSlug": "minimum-string-length-after-removing-substrings", "content": "

You are given a string s consisting only of uppercase English letters.

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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.

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Return the minimum possible length of the resulting string that you can obtain.

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Note that the string concatenates after removing the substring and could produce new "AB" or "CD" substrings.

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Example 1:

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\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.
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Example 2:

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\nInput: s = "ACBBD"\nOutput: 5\nExplanation: We cannot do any operations on the string so the length remains the same.\n
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Constraints:

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Compiled with clang 11 using the latest C++ 17 standard.

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Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

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Most standard library headers are already included automatically for your convenience.

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OpenJDK 17. Java 8 features such as lambda expressions and stream API can be used.

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Most standard library headers are already included automatically for your convenience.

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Includes Pair class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.

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Python 2.7.12.

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Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.

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For Map/TreeMap data structure, you may use sortedcontainers library.

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Note that Python 2.7 will not be maintained past 2020. For the latest Python, please choose Python3 instead.

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Compiled with gcc 8.2 using the gnu11 standard.

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Your code is compiled with level one optimization (-O1). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

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Most standard library headers are already included automatically for your convenience.

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For hash table operations, you may use uthash. \\\"uthash.h\\\" is included by default. Below are some examples:

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3. Deleting an item in a hash:\\r\\n

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C# 10 with .NET 6 runtime

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Node.js 16.13.2.

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Your code is run with --harmony flag, enabling new ES6 features.

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lodash.js library is included by default.

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For Priority Queue / Queue data structures, you may use 5.3.0 version of datastructures-js/priority-queue and 4.2.1 version of datastructures-js/queue.

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Ruby 3.1

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Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms

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Swift 5.5.2.

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Go 1.18

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Support https://godoc.org/github.com/emirpasic/gods@v1.18.1 library.

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Python 3.10.

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Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.

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Rust 1.58.1

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PHP 8.1.

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With bcmath module

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TypeScript 4.5.4, Node.js 16.13.2.

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Run with Racket 8.3.

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Dart 2.17.3

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