problem0856

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Published: Jul 25, 2019 License: MIT Imports: 0 Imported by: 0

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856. Score of Parentheses

题目

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: "()"
Output: 1

Example 2:

Input: "(())"
Output: 2

Example 3:

Input: "()()"
Output: 2

Example 4:

Input: "(()(()))"
Output: 6

Note:

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

解题思路

见程序注释

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