Discussion Post (created on 10/5/2021 at 15:46)

856. Score of Parentheses

Medium

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Given a balanced parentheses string s, compute the score of the string based on the following rule:

• () has score 1
• AB has score A + B, where A and B are balanced parentheses strings.
• (A) has score 2 * A, where A is a balanced parentheses string.

 

Example 1:

Input: s = "()"
Output: 1

Example 2:

Input: s = "(())"
Output: 2

Example 3:

Input: s = "()()"
Output: 2

Example 4:

Input: s = "(()(()))"
Output: 6

 

Note:

1. s is a balanced parentheses string, containing only ( and ).
2. 2 <= s.length <= 50