Problem: Longest Valid Parentheses
Understand how to determine the longest well-formed parentheses substring in a given string by using a stack to track indices of opening parentheses. This lesson guides you through an efficient O(n) time complexity solution, explaining the algorithm and Java implementation for accurate string parsing.
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...