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:

1 | Input: "()" |

Example 2:

1 | Input: "(())" |

Example 3:

1 | Input: "()()" |

Note:

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