import java.util.Scanner; import java.util.TreeSet; /** * 明明的随机数 * */ public class Main_3 { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int length = scanner.nextInt(); TreeSet<Integer> treeSet = new TreeSet<>(); while (scanner.hasNextInt()) { treeSet.add(scanner.nextInt()); } for (Integer integer : treeSet) { System.out.println(integer); } } }