[프로그래머스/Java] 의상

https://school.programmers.co.kr/learn/courses/30/lessons/42578?language=java

프로그래머스

조합 까먹음 ㅠㅠ

 

import java.util.HashMap;

class Solution {
    public int solution(String[][] clothes) {
        HashMap<String, Integer> map = new HashMap<>();
        
        for(String[] cloth : clothes){
            String kind = cloth[1];
            map.put(kind, map.getOrDefault(kind, 0)+1);
        }
        int answer = 1;
        for(String key : map.keySet()){
            int num = map.get(key);
            answer *= (num+1);
        }
        
        return answer-1;
    }
}