private static int DefenceLevel(Land land) { return land.Towers.Count/Area(land); }
private bool CanNotDefende(Land land) { return DefenceLevel(land) < _context.MinimumDefence; }
private static int Area(Land land) { return (land.LowerRightX - land.UpperLeftX)*(land.UpperLeftX - land.LowerRightY); }