<gh_stars>0

class Edge():
    def __init__(self, begin=None, end=None, max_speed=0):
        self.begin = begin
        self.end = end
        self.max_speed = max_speed
class Edge():
    def __init__(self, begin=None, end=None, max_speed=0):
        self.begin = begin
        self.end = end
        self.max_speed = max_speed