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Grokking the Coding Interview Patterns in Python

Valid Parentheses

Explore how to determine if a string contains valid parentheses by applying stack concepts. Learn to ensure every opening symbol closes correctly and in order, building a strong foundation for similar coding challenges in interviews.

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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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