Solution: Minimum String Length After Removing Substrings
Explore how to apply stack techniques to iteratively remove 'AB' and 'CD' substring pairs from a string. Understand the step-by-step algorithm for using a stack to manage characters, identify removable pairs, and achieve the shortest possible string length after all removals. This lesson teaches an efficient O(n) approach, emphasizing both time and space complexity considerations.
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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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