[프로그래머스] 올바른 괄호

class Solution {
    boolean solution(String s) {
        char[] charArray = s.toCharArray();
        int count = 0;
        for(int i = 0; i < charArray.length; i++){
            if(count < 0)   return false;
            if(charArray[i] == '(') count++;
            else{
               count--; 
            }
        }
        if(count == 0)  return true;
        else
            return false;
    }
}