내 풀이

class Solution {
    public int solution(String[] s1, String[] s2) {
        int answer = 0;
        for(int j = 0 ; j < s1.length ; j++){
            for(int i = 0 ; i < s2.length; i++){
                if(s1[j].equals(s2[i])){
                 ++answer;   
                }
            }            
        }
        return answer;
    }
}