public class Competition {
    
    private List<Athlete> runners;
    private BinarySearchTree<Athlete> leaderboard;
    private RaceSimulator sim;
    
    public Competition() {
        runners = new List<>();
        leaderboard = new BinarySearchTree<>();
        sim = new RaceSimulator();
    }
    
    public void newRunner(String name) {
        runners.append(new Athlete(name));
    }
    
    public void simulate() {
        runners.toFirst();
        while (runners.hasAccess()) {
            sim.simulate(runners.getContent());
            leaderboard.insert(runners.getContent());
            runners.next();
        }
        
        leaderboard.printInOrder();
    }
    
    public Athlete[] top3() {
        Athlete[] top = new Athlete[3];
        //TODO
        return top;
    }
}