LeetCode 921 Minimum Add to Make Parentheses Valid - Popular Interview Question Solved Using Stack

921 Minimum Add to Make Parentheses Valid -LeetCode - Popular Interview Question Solved Using Stack - Java Solution Explained With Examples.

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Link To The Problem:

Problem Description:
A parentheses string is valid if and only if:

It is the empty string,
It can be written as AB (A concatenated with B), where A and B are valid strings, or
It can be written as (A), where A is a valid string.
You are given a parentheses string s. In one move, you can insert a parenthesis at any position of the string.

For example, if s = "()))", you can insert an opening parenthesis to be "(()))" or a closing parenthesis to be "())))".
Return the minimum number of moves required to make s valid.

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