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Grokking the Coding Interview Patterns in C++

Solution: Minimum Remove to Make Valid Parentheses

Explore how to use stack data structures to identify and remove invalid parentheses from a given string. This lesson teaches methods to validate parentheses efficiently, invoking stack operations like push and pop while addressing time and space complexity considerations for optimal solutions.

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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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