#362 · #1190 · Reverse Substrings Between Each Pair of Parentheses(反转每对括号间的子串)

You are given a string s consisting of lowercase letters and parentheses. Reverse the substrings inside each pair of matching parentheses, starting from the innermost pair, and return the result. Constraints: 1 <= s.length <= 2000; the input is always valid.