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Data Structures for Coding Interviews in Python

Challenge: Valid Parentheses

Explore how to determine if a string of parentheses is valid by using stacks and queues. Learn to implement checks that verify proper matching and ordering of different types of parentheses in Python.

We'll cover the following...

Statement

Given a string, exp, which 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 ...