Solution: Minimum String Length After Removing Substrings
Explore a stack-based approach to iteratively remove all occurrences of substrings AB and CD from a given string. Understand how this method efficiently finds and eliminates pairs by processing each character once, enabling you to determine the minimal possible string length after all removals.
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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, potentially creating new occurrences of "AB" or "CD" that can also be removed.
Constraints:
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