2. (3 points) On the Island of Misfortune, there live knights who always tell the truth, and liars who always lie. One day, $n$ islanders gathered in a room.

The first one said: "Exactly 1 percent of those present in this room are liars."

The second one said: "Exactly 2 percent of those present in this room are liars."

and so on

The person with number $n$ said: "Exactly $n$ percent of those present in this room are liars."

How many people could have been in the room, given that it is known for sure that at least one of them is a knight?