NeetCode #369LC-921MediumStack
← Back to All Problems#369 · #921 · Minimum Add to Make Parentheses Valid(使括号有效的最少添加)
📌 Problem Statement & Constraints
A parentheses string is valid if it is empty, or can be written as
AB or (A) where A and B are valid. Given a string s, return the minimum number of parentheses to insert to make it valid. Constraints: 1 <= s.length <= 1000.🔒
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