class Rect:
    def __init__(self, height: int, width: int):
        if height < 0 or width < 0:
            raise ValueError('Длины сторон не могут быть отрицательными')
        self.height = height
        self.width = width

    def area(self):
        return self.height * self.width

    def perimeter(self):
        return 2 * (self.height + self.width)

    def scale(self, multiplier):
        self.height *= multiplier
        self.width *= multiplier

    def rotate(self):
        tmp = self.height
        self.height = self.width
        self.width = tmp


def main():
    r1 = Rect(10, 56)
    print(r1.area())
    print(r1.perimeter())
    r1.scale(10)
    r1.scale(0.1)
    r1.rotate()


if __name__ == '__main__':
    main()