Longest Valid Parentheses | Solution through the logical steps

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Problem link

Step 01: Problem Analysis

Problem Statement:
Given a string s containing only the characters '(' and ')', we need to return the length of the longest valid (well-formed) parentheses substring.

• For example, for s = "(()", the answer is 2 because the longest valid substring is "()".

• For s = ")()())", the answer is 4 because the longest valid subst…