题解 | #明明的随机数#

import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        Set<Integer> set = new TreeSet<>();
        for (int i = 0; i < num; i ++){
            set.add(in.nextInt());
        }
        set.forEach(System.out::println);
    }
}