완벽한 괄호

import java.util.*;
class Solution {
    boolean solution(String s) {

        int count = 0;

        for(int i = 0; i < s.length(); i++){
            if('(' == s.charAt(i)){
                count++;
            }else{
                count--;
            }

            if(count < 0){
                return false;
            }
        }

        return count == 0 ? true : false;
    }
}