public int getNumberOfPlayers(){
        if(playerIds.isEmpty())
        {
            for(int i : sentinel)
            {
                if(i != 0)
                {
                    playerIds.add(i);
                }
            }
            for(int i : scourge)
            {
                if(i != 0)
                {
                    playerIds.add(i);
                }
            }
        }
        int c = 0;
        for(int i : playerIds)
        {
            if(i != 0)
            {
                c++;
            }
        }
        return c;
    }