题解 | #明明的随机数#

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
import java.util.stream.Stream;

public class Main {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int firstNum = input.nextInt();
        if (firstNum > 500) {
            System.out.println("no!");
        }

        ArrayList<Integer> list = new ArrayList<>();

        boolean flag = true;
        int num = 0;
        while (flag) {
            int nextNum = input.nextInt();
            if (nextNum > 500) {
                System.out.println("no!");
            }

            if (list.size() <= 1000) {
                list.add(nextNum);
            } else {
                System.out.println("no!");
            }

            num++;
            if (num == firstNum) {
                flag = false;
            }
        }
        Collections.sort(list);

        Stream<Integer> distinct = list.stream().distinct();


        distinct.forEach(integer -> System.out.println(integer));
    }

}