[프로그래머스/Java] 올바른 괄호

-Code

import java.util.*;

class Solution {
    boolean solution(String s) {
        Deque<String> deque = new ArrayDeque<>();
        for (String ss : s.split("")) {
            if (ss.equals("(")) {
                deque.add(ss);
                continue;
            }
            if (deque.isEmpty()) return false;
            deque.pop();
        }
        return deque.isEmpty();
    }
}