import java.util.*;

class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextInt();
        }

       HashSet<Integer> set=new HashSet<>();
       for(int gv:arr){
           set.put(gv);
       }
       for(int ab:set){
           System.out.print(ab+" ");
       }

        
    }
}