Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C#

Solution: Minimum Remove to Make Valid Parentheses

Explore how to apply stack methods to identify and remove unmatched parentheses in a string, ensuring valid parenthesization. This lesson helps you implement efficient LIFO stack-based solutions to handle parentheses validation with optimal time and space complexity.

We'll cover the following...

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
...