题解 | #明明的随机数#

import java.util.*;
public class Main{
    public static void main(String [] args){
        /*Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){
            int N=sc.nextInt();
            int [] arr=new int[N];
            for(int i=0;i<N;i++){
                arr[i]=sc.nextInt();
            }
            TreeSet<Integer> set=new TreeSet<>();
            for(int i=0;i<arr.length;i++){
                set.add(arr[i]);
            }
            //增强for循环
            for(Integer i:set){
                System.out.println(i);
            }
            //Iterator迭代器
            Iterator it=set.iterator();
            while(it.hasNext()){
                System.out.println(it.next());
            }
        }*/
        
        /*=========================================*/
        Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){
            int N=sc.nextInt();
            Set<Integer> set=new TreeSet<>();
            for(int i=0;i<N;i++){
                set.add(sc.nextInt());
            }
            set.forEach(System.out::println);
        }
    }
}