[프로그래머스][Java] 쇠막대기

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import java.util.*; class Solution { public int solution(String arrangement) { String reArr = arrangement.replace("()","0"); Stack<Character> st = new Stack<Character>(); int answer = 0; for(int i=0; i<reArr.length(); i++){ if(reArr.charAt(i) == '('){ st.add(reArr.charAt(i)); } else if(reArr.charAt(i) == '0'){ answer+=st.size(); } else if(reArr.charAt(i) == ')'){ answer+=1; st.pop(); } } return answer; } }

참고 : https://medium.com/@nsh235482/java-coding-programmers-stack-queue-lv2-%EC%87%A0%EB%A7%89%EB%8C%80%EA%B8%B0-d3c482da3d98

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