Create a class named MyList. It will use a "Linked List" of integers as its attribute. The
constructor will simply create an empty list.
This will be a different type of Linked List, as all of the items will be in ascending
numerical order. That means items will not necessarily be placed at the end of the list, but
placed where it should be located. Your list should only contain unique items. Therefore,
if your add() method is passed an integer that already exists on the list, do not add
it. The list should contain only one instance of an integer; no duplicate values.
Note that the iterator simply uses the next() method, so if you use the iterator to find the
location, you may need to keep track of the current index yourself.
The following are the methods to create for this class:
1. add(value): Add the specified integer value to its appropriate place on the list
2. remove(value): Remove the specified value from the list
3. list(): This method uses the iterator to print the contents of the list. It should
appear on the same line, separated by commas. For example: 1, 3, 4, 6, 8
Note that the last item will NOT have a comma following it.
4. maxgap(): This method will return the largest difference between items on the
list. For example, in the sample list displayed in #3 above, the largest gap is 2
(between 4 and 6 and between 6 and 8).
