Problem: Longest Valid Parentheses
Understand how to determine the longest well-formed parentheses substring in a string using stacks. Learn to track indices for efficient computation, handle unmatched parentheses, and implement this approach with O(n) time and space complexity.
We'll cover the following...
We'll cover the following...
Statement
Given a string s consisting solely of the characters '(' and ')', determine the length of the longest valid (well-formed) parentheses substring contained within s.
A valid parentheses substring is one in which every opening parenthesis '(' has a corresponding closing parenthesis ')', and the pairs are properly nested.
Constraints:
s.length...