题解 | 明明的随机数

import java.util.Scanner;
import java.util.HashSet;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextInt()) { 
            int a = in.nextInt();
            HashSet<Integer> integers = new HashSet<>();
            for (int i = 1; i <= a; i++) {
                integers.add(in.nextInt());
            }
            integers.stream().sorted().forEach(System.out::println);
        }
        }}