출제 링크 : programmers.co.kr/learn/courses/30/lessons/12906
import java.util.ArrayList;
import java.util.List;
class Solution {
public int[] solution(int[] arr) {
List<Integer> answer = new ArrayList<>();
int temp = 99;
for (int num : arr) {
if (num != temp) {
temp = num;
answer.add(num);
}
}
return answer.stream().mapToInt(i -> i.intValue()).toArray();
}
}