import java.util.*;
public class Solution {
public int[] solution(int []arr) {
ArrayList<Integer> answerList = new ArrayList<Integer>();
int value = -1;
for(int i=0; i<arr.length; i++){
if(value != arr[i]){
answerList.add(arr[i]);
value = arr[i];
}
}
int[] answer = new int[answerList.size()];
for(int i=0; i<answer.length;i++){
answer[i] = answerList.get(i);
}
return answer;
}
}```