# representing circles, movement, etc... in the OOP style.


def distance(x1,y1,x2,y2):
    cx = x1-x2
    cy = y1=y2
    return (cx*cx + cy*cy)**0.5
# distance function

class circle:
    def __init__(self,x0,y0,r0):  # initialize coordinates and radius
        self.x = x0
        self.y = y0
        self.radius = r0
        self.dx = 0      # initial movement vector is also zero
        self.dy = 0
    # contructor

    def movement(self,newdx,newdy):  # set movement vector
        self.dx = newdx
        self.dy = newdy
    # movement

    def move(self):   # change coordinates according to dx,dy
        self.x += self.dx
        self.y += self.dy
    # move

    def collision(self,B): #detect collision with circle B
        d = distance(self.x,self.y,B.x,B.y)
        if d <= self.radius + B.radius: return True
        else: return False
    # collision
# class circle

c1 = circle(4,5,10)
c1.movement(3,3)
c1.move()
print c1.x, c1.y