题解 | #明明的随机数#

import java.util.*;

public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int num = sc.nextInt();
            Set<Integer> set = new HashSet();
            for (int i = 0; i < num; i++){
                set.add(sc.nextInt());
            }
            List<Integer> list = new ArrayList(set);
            Collections.sort(list);
            list.forEach(number -> System.out.println(number));
        }
    }
}