摘要：Given a balanced parentheses string S, compute the score of the string based on the following rule: Example 1: Input: "()" Output: 1 Example 2: Input: 阅读全文

摘要：Given two strings A and B of lowercase letters, return true if and only if we can swap two letters in A so that the result equals B. 题目大意：给出A,B两个字符串，问 阅读全文