[프로그래머스] 의상 java 자바(LEVEL2)

https://school.programmers.co.kr/learn/courses/30/lessons/42578

프로그래머스

 

나의풀이

import java.util.*;
class Solution {
    public int solution(String[][] clothes) {
        int answer = 1;
        Map<String, Integer> m = new HashMap<>();
        
        for(int i=0; i<clothes.length; i++){
            int cnt=m.getOrDefault(clothes[i][1],0);
            m.put(clothes[i][1], cnt+1);
        }
        
        for(String s:m.keySet()){
            answer*=(m.get(s)+1);
        }
            
        return answer-1;
    }
}