题解 | #明明的随机数#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) { 
            int N = in.nextInt();
            TreeSet<Integer> map = new TreeSet<>();
            for(;N-->0;){
                map.add(in.nextInt());
            }
            map.forEach(b->System.out.println(b));
        }
    }
}