Minimum Remove to Make Valid Parentheses

Understand how to remove the minimum number of parentheses to make a string valid by applying stack-based techniques. This lesson helps you implement efficient solutions to balance parentheses according to coding interview patterns.

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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:

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