q032_longest_valid_parentheses

Overview ¶

[Hard] Longest Valid Parentheses https://leetcode.com/problems/longest-valid-parentheses/

Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring.

Example 1:

Input: "(()" Output: 2 Explanation: The longest valid parentheses substring is "()"

Example 2:

Input: ")()())" Output: 4 Explanation: The longest valid parentheses substring is "()()"