Что не правильно?

public static int calculateHorsesFinished(List<Horse> horses) throws InterruptedException {
       int finishedCount = 0;
       //add your implementation here - добавь свою реалзацию тут
       for (Horse horse : horses) {
           if (!horse.isFinished) {
               System.out.println("Waiting for " + horse.getName());

           }
           else finishedCount++;
       }
       return finishedCount;
   }