Solution: Longest Valid Parentheses
Understand how to identify the longest well-formed parentheses substring by applying the stack pattern. This lesson guides you through using stack operations to track and calculate valid parentheses pairs, helping you develop efficient solutions for coding interview challenges.
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 substring.
Constraints:
s.length...