Bill and “0” were having their introductions when “0” claimed that it could make any number from Room “W” become “0” if “new” numbers (occupants) from a different room could interact with the numbers of “W”. Bill thought of verifying this and opened the door of Room “W”. He was surprised to find a huge set of occupants similar to those in Room “W” but they carried a “negative” sign along with them. The moment these numbers entered “Room W”, the room changed again and the signboard now read “Room I”.
(Integers are represented by the letter I)
Now, amongst the new occupants who came in, which is the greatest?
-1