Solution: Minimum String Length After Removing Substrings
Explore how to use a stack to iteratively remove all occurrences of the substrings AB and CD from a given string. Understand the step-by-step process that achieves the shortest possible string length by checking pairs and removing them efficiently, while learning to analyze the time and space complexity of this solution.
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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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