HRuler

1. 1번째 풀이 import java.util.Arrays; class Solution { public String solution(int[] numbers) { String answer = ""; String [] strings = new String [numbers.length]; String [] strings2 = new String [numbers.length]; for(int i = 0; i < numbers.length; i = i + 1) { strings[i] = String.valueOf(numbers[i]); } for(int i = 0; i < strings.length; i = i + 1) { int flag = 0; for(int j = 0; j < strings.length;..

1. 나의 풀이 import java.util.HashMap; class Solution { public String solution(String[] participant, String[] completion) { String answer = ""; HashMap hm = new HashMap(); for (String player : participant) hm.put(player, hm.getOrDefault(player, 0) + 1); for (String player : completion) hm.put(player, hm.get(player) - 1); for (String key : hm.keySet()) { if (hm.get(key) != 0){ answer = key; } } retur..