题解 | #明明的随机数#

import java.util.Scanner;
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);
        int a = in.nextInt();
        TreeSet<Integer> tree = new TreeSet();
        for(int i = 0;i < a;i++){
            tree.add(in.nextInt());
        }
        tree.forEach(System.out::println);
    }
}