LeetCode 20: Valid Parentheses (Amazon & Google) | DSA Stack Series | AlgoXploration скачать в хорошем качестве

LeetCode 20: Valid Parentheses (Amazon & Google) | DSA Stack Series | AlgoXploration

https://forms.gle/sLU9bBs5basP3hx86 If you’re interested in learning Data Structures and Algorithms (DSA) directly from me, please fill out this form. Our team will reach out to you with further details. In this video, we learn how to check whether a string of parentheses is valid using the stack data structure — one of the most common and fundamental interview problems. A string is considered valid when every opening bracket has a corresponding closing bracket in the correct order. What this video covers How to use a stack to track opening brackets Matching parentheses: (), {}, [] Why checking order matters Step-by-step explanation of push/pop operations Edge cases: Extra closing brackets Unmatched opening brackets Mixed types of brackets How to return true/false based on stack state Time Complexity: O(n) Space Complexity: O(n) Why this matters This is one of the most frequently asked stack problems in coding interviews. Understanding this pattern builds the foundation for more advanced problems like expression evaluation, infix-to-postfix conversion, and parsing logic. Timeline Understanding the problem How a stack helps Step-by-step dry run Returning final answer Practice Question LeetCode – Valid Parentheses https://leetcode.com/problems/valid-p... Other Related Problems: https://leetcode.com/problems/minimum... https://leetcode.com/problems/minimum... (Optional) https://leetcode.com/problems/longest... Code 👉 Solution: Pinned on the comments #ValidParentheses #Stack #DSA #DataStructures #Algorithms #CodingInterview #TechInterview #JavaProgramming #ParenthesesMatching #BalancedBrackets #StackImplementation #LeetCode #GeeksforGeeks #CodingTutorial #ProblemSolving #ComputerScience #LearnDSA #CodeWithMe #BracketMatching #StringProblems