class Circle:
    radius: int
    pi = 3.14

    def __init__(self, radius: int):
        self.radius = radius

    def set_radius(self, new_radius: int) -> None:
        self.radius = new_radius

    def get_area(self) -> float:
        return self.pi * (self.radius ** 2)

    def get_circumference(self) -> float:
        return self.pi * 2 * self.radius
