856. Score of Parentheses LeetCode Solution | Easy Approach

Minimum Cost to Merge Stones

Score of Parentheses Given a balanced parentheses string s, return the score of the string.

The score of a balanced parentheses string is 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


  • 2 <= s.length <= 50
  • s consists of only '(' and ')'.
  • s is a balanced parentheses string.

Score of Parentheses Solutions

Time: O(n)
Space: O(n)


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