How to Solve the Valid Parentheses Problem in Python | Step-by-Step Interview Guide скачать в хорошем качестве

How to Solve the Valid Parentheses Problem in Python | Step-by-Step Interview Guide

In this video, we explore one of the most commonly asked coding interview questions: the Valid Parentheses problem. The problem involves determining whether a given string containing only brackets — round (), square [], and curly {} — is valid based on a set of rules. These include ensuring only valid bracket types are used, each opening bracket has a corresponding closing bracket, brackets are properly nested, no premature closures occur, and that the count of opening and closing brackets is balanced. The video then explains how to implement a solution using a stack data structure. By pushing opening brackets to the stack and popping to match closing brackets, we can efficiently determine validity. The tutorial walks through multiple examples to illustrate the logic and concludes with Python code implementation and optimization techniques. It's an in-depth yet beginner-friendly explanation that helps viewers understand both the logic and the coding behind solving valid parentheses problems.