Stacks: Balanced Brackets | HackerRank Given a string containing three types of brackets, determine if it is balanced. www.hackerrank.com 코딩테스트 연습 - Balanced Brackets 설명 A bracket is considered to be any one of the following characters: (, ), {, }, [, or ]. Two brackets are considered to be a matched pair if the an opening bracket (i.e., (, [, or {) occurs to the left of a closing bracket (i.e.,..