// editor1
 remove_duplicates():
 try:
    n= int(input())
     if n<0:
         print("Invalid input")
    else:
         numbers=list(map(int,input().Split()))
         if len(numbers) != n:
         unique_numbers =list(set(numbers))
          print(*unique_numbers)
     else:
          unique_numbers=list(set(numbers))
           print(*unique_numbers)
    except Exception as e:
     pass
     remove_duplicates()