Longest Valid Parentheses
Explore how to identify the longest valid substring of parentheses in a string by applying stack techniques. This lesson helps you understand nested parentheses rules and develop solutions to efficiently solve this classic coding interview problem.
We'll cover the following...
We'll cover the following...
Statement
You are given a string composed entirely of ‘(’ and ‘)’ characters. Your goal is to identify the longest contiguous segment (substring) within this string that represents a “well-formed” or “valid” sequence of parentheses.
A substring is considered valid if:
Every opening parenthesis ‘
(’ has a corresponding closing parenthesis ‘)’.The pairs of parentheses are correctly nested.
Return the length of this longest valid ...