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Grokking the Coding Interview Patterns

Valid Parentheses

Explore how to determine valid parentheses strings by using stack principles. Understand the necessary conditions for matching brackets and implement solutions efficiently. This lesson helps build skills in problem validation and practical coding for interview patterns.

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Statement

Given a string that may consist of opening and closing parentheses, your task is to check whether or not the string contains valid parenthesization.

The conditions to validate are as follows:

  1. Every opening parenthesis should be closed by the same kind of parenthesis. Therefore, {)and [(]) strings are invalid.

  2. Every opening parenthesis must be closed in the correct order. Therefore, )( and ()(() are invalid.

Constraints:

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