题解 | #明明的随机数#

import java.util.Scanner;

import java.util.Arrays;
import java.util.HashSet;


// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int len = sc.nextInt();
        int[] arr1 = new int[len];
        for (int i = 0; i < arr1.length; i++) {
            arr1[i] = sc.nextInt();
        }

        pai(arr1);
    }
    public static void pai(int[] arr) {
        HashSet<Integer> s1 = new HashSet<>();
        for (int i = 0; i < arr.length; i++) {
            s1.add(arr[i]);

        }
        int[] arr1  = new int[s1.size()];


        int a = 0;
        for (Integer integer : s1) {
            arr1[a++] = integer;
        }

        Arrays.sort(arr1);
        for (int i = 0; i <arr1.length; i++) {
            System.out.println(arr1[i]);
        }



    }



}