의상

import java.util.*;
class Solution {
    public int solution(String[][] clothes) {
        int answer = 1;

        HashMap<String, Integer> map = new HashMap<String, Integer>();
        for(int i = 0; i < clothes.length; i++){
            map.put(clothes[i][1], map.getOrDefault(clothes[i][1], 0) + 1);
        }

        for(String s : map.keySet()){
            answer *= map.get(s) + 1;
        }

        answer--;

        return answer;
    }
}