Implement a class that tracks elephants entering and leaving a room and returns your elephants that are at least as tall as the tallest competitor present.

Implement an ElephantCompetition class. The constructor receives your team's elephants (name, height) and their private schedule (enter and exit minute). elephantEntered(time, height) and elephantLeft(time, height) are called for every elephant, yours or a competitor's, in time order. getBiggestElephants() must return, sorted alphabetically, the names of your elephants currently in the room that are at least as tall as the tallest competitor elephant currently in the room.