Given a string S consisting only of opening and closing parenthesis 'ie '(' and ')', find out the length of the longest valid(well-formed) parentheses substring. NOTE: Length of the smallest valid substring ( ) is 2.
Example 1:
Input: S = "(()("
Output: 2
Explanation: The longest valid
substring is "()". Length = 2.
Example 2:
Input: S = "()(())("
Output: 6
Explanation: The longest valid
substring is "()(())". Length = 6.
Your Task:
You dont need to read input or print anything. Complete the function findMaxLen() which takes S as input parameter and returns the maxlength.
Expected Time Complexity:O(n) Expected Auxiliary Space: O(1)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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