题解 | #明明的随机数#

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

// 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 in = new Scanner(System.in);
        Set<Integer> set = new TreeSet<>();
        int total = in.nextInt();
        for (int i = 0; i < total; i++) {
            int number = in.nextInt();
            set.add(number);
        }
        Iterator iterator=set.iterator();
        while(iterator.hasNext()){
            int number=(int)iterator.next();
            System.out.println(number);
        }



    }


}