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 number = in.nextInt();
        Set<Integer> set = new TreeSet<>();
        for(int i=number;i>0;i--){
            set.add(in.nextInt());
        }
        for (Integer integer : set){
            System.out.println(integer);
        }
    }
}