import java.util.;
import java.io.;

public class Main{
public static void main(String[] args)throws Exception{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int n = Integer.parseInt(br.readLine());
String[] numStr = br.readLine().split(” “);
int[] nums = new int[n];
for(int i = 0;i < n;i++){
nums[i] = Integer.parseInt(numStr[i]);
}
quickSort(nums,0,n - 1);
deleteNums(nums);
}

public static void quickSort(int[] nums,int l,int r){
    int i = l - 1,j = r + 1;
    int mid = nums[i + (j - i) / 2];
    if(l < r){
        while(i < j){
            do{
                i++;
            }while(nums[i] < mid);
            do{
                j--;
            }while(nums[j] > mid);
            if(i < j){
                int num = nums[i];
                nums[i] = nums[j];
                nums[j] = num;
            }
        }
        quickSort(nums,l,j);
        quickSort(nums,j + 1,r);
    }
}

public static void deleteNums(int[] nums){
    int left = 0,right = 1;
    while(right < nums.length){
        if(nums[right] != nums[left]){
            left++;
            nums[left] = nums[right];
        }
        right++;
    }
    for(int i = 0;i < left + 1;i++){
        System.out.print(nums[i] + " ");
    }
}

}