위장(spy)

import java.util.HashMap; public class Solution { public int solution(String[][] clothes) { int ans = 1; HashMap<String, Integer> clothesMap = new HashMap<>(); for (int i = 0; i < clothes.length; i++) { clothesMap.put(clothes[i][1], clothesMap.getOrDefault(clothes[i][1], 1) + 1); } for (String s : clothesMap.keySet()) { ans *= clothesMap.get(s); } return ans - 1; } public static void main(String[] args) { Solution s = new Solution(); String[][] clothes = { {"yellowHat", "headgear"}, {"blueSunglasses", "eyewear"}, {"greenTurban", "headgear"} }; System.out.println(s.solution(clothes)); } }