Longest Valid Parentheses
Explore how to identify the longest contiguous valid substring of parentheses using stacks. Learn what defines a well-formed sequence and practice implementing the solution for this common interview problem. Gain confidence in applying stack algorithms for nested structures and improve your coding interview skills.
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 ...