import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

public class Back_10867 {
    public static void main(String[] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int N = Integer.parseInt(br.readLine());
        
        StringTokenizer st = new StringTokenizer(br.readLine());
        StringBuilder sb = new StringBuilder();
        HashSet<Integer> hashSet = new HashSet<>();
        for (int i = 0; i < N; i++) {
            hashSet.add(Integer.parseInt(st.nextToken()));
        }

        ArrayList<Integer> arr = new ArrayList<>(hashSet);
        Collections.sort(arr);

        for (Integer integer : arr) {
            sb.append(integer).append(" ");
        }
        System.out.println(sb);
        br.close();
    }
}