Minimum Parantheses! - InterviewBit Solution

Problem Description:

Given a string A of parentheses ‘(‘ or ‘)’.
The task is to find a minimum number of parentheses ‘(‘ or ‘)’ (at any positions) we must add to make the resulting parentheses string valid.
A string is valid if:

Open brackets must be closed by the corresponding closing bracket.
Open brackets must be closed in the correct order.

Problem Constraints

1 <= |A| <= 1e5
A[i] = '(' or A[i] = ')'

Input Format

The first and only argument is a string A.

Output Format

Return a single integer denoting the minimum number of parentheses ‘(‘ or ‘)’ (at any positions) we must add in A to make the resulting parentheses string valid.

Example Input

Input 1:
A = "())"

Input 2:
A = "((("

Example Output

Output 1:
1

Output 2:
3

Example Explanation

Explanation 1:
One '(' is required at the beginning.

Explanation 2:
Three ')' is required at the end.

Solution Approach:

Solution:

Code in C++

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