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Minimum String Length After Removing Substrings

Understand how to use stack data structures to repeatedly remove substrings AB and CD from a string, resulting in the minimum possible length. This lesson helps develop skills in string manipulation and applying algorithmic patterns to efficiently solve related problems.

Statement

You are given a string, s, containing only uppercase English letters. You can perform operations on this string where, in each operation, you remove any occurrence of the substrings "AB" or "CD" from s.

Your task is to return the shortest string length after applying all possible operations.

Note: After each removal, the string joins back together, ...