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Grokking the Coding Interview Patterns in Go

Solution: Minimum Remove to Make Valid Parentheses

Explore how to use stacks to remove the minimum unmatched parentheses from a string, ensuring it becomes valid. Learn to implement this solution efficiently with a clear understanding of time and space complexity, preparing you for complex coding interview problems.

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Statement

Given a string, s, that may have matchedEach opening parenthesis, (, has a closing parenthesis, ), for it. and unmatchedThere is no corresponding closing parenthesis, ), for an opening parenthesis, (. parentheses, remove the minimum number of parentheses so that the resulting string represents a valid parenthesization. For example, the string “a(b)” represents a valid parenthesization while the string “a(b” doesn’t, since the opening parenthesis doesn’t have any corresponding closing parenthesis.

Constraints:

  • 1≤1 \leq s.length
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