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Solution: Minimum String Length After Removing Substrings

Explore how to implement a stack-based algorithm to remove all occurrences of specific substrings from a string. Understand the step-by-step process to achieve the shortest possible string length by iteratively removing 'AB' and 'CD' pairs. This lesson enhances your problem-solving skills using stacks for string manipulation in coding interviews.

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:

  • 11 \leq s.length ...