L.B.

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()){
            Set<Integer> set = new HashSet<>();
            List<Integer> list = new ArrayList<>();
            int n = scanner.nextInt();
            while (n > 0 ){
                set.add(scanner.nextInt());
                n--;
            }
            for(int key : set){
                list.add(key);
            }
            Collections.sort(list);
            for(Integer l : list){
                System.out.println(l);
            }

        }
    }
}