Introduction The “Valid Parentheses” problem (Leetcode 20) is a popular question often asked in coding interviews. The task is to check if a given string containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’ is valid. An input string is valid if the brackets are correctly closed and nested. In this blog post, … Read more
Valid Parentheses – Leetcode 20 Solution in Java Leetcode’s “Valid Parentheses” problem is one of the classic questions in coding interviews, as it tests your knowledge of stacks and string manipulation. Let’s explore this problem, its requirements, and multiple solutions to solve it efficiently. Problem Statement Given a string s containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’, determine if the … Read more