import java.util.*; class Solution { public int[] solution(int[] numbers) { Set answerSet = new HashSet(); for (int i = 0; i < numbers.length - 1; i++) { for (int j = i + 1; j < numbers.length; j++) { answerSet.add(numbers[i] + numbers[j]); } } // Set을 정렬된 배열로 변환 List sortedAnswerList = new ArrayList(answerSet); Collections.sort(sortedAnswerList); int[] answer = new int[sortedAnswerList.size()];..