import java.util.Scanner;
import java.util.TreeSet;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (sc.hasNext()) {
int n = sc.nextInt();
TreeSet<Integer> set = new TreeSet<>();
for (int i = 0; i < n; i++) {
set.add(sc.nextInt());
}
for (Integer i : set) {
System.out.println(i);
}
}
}
}
import java.util.TreeSet;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (sc.hasNext()) {
int n = sc.nextInt();
TreeSet<Integer> set = new TreeSet<>();
for (int i = 0; i < n; i++) {
set.add(sc.nextInt());
}
for (Integer i : set) {
System.out.println(i);
}
}
}
}