풀이
import java.util.*;
class Solution {
public int[] solution(int[] numbers) {
ArrayList<Integer> list = new ArrayList<>();
for (int i = 0; i < numbers.length - 1; i++) {
for (int j = i + 1; j < numbers.length; j++) {
int sum = numbers[i] + numbers[j];
if (!list.contains(sum)) {
list.add(sum);
}
}
}
Collections.sort(list);
int[] answer = new int[list.size()];
for (int k = 0; k < list.size(); k++) {
answer[k] = list.get(k);
}
return answer;
}
}