class Vertex:
        
    center = (0,0)
    adj_list = []
        
    def __init__(self, center):
        self.center = center
        self.adj_list = []
7f341509d077f263d9ae6d7f454cad0019577fac
<mask token>

class Vertex:
    <mask token>
    <mask token>
    <mask token>

class Vertex:
    <mask token>
    <mask token>

    def __init__(self, center):
        self.center = center
        self.adj_list = []

class Vertex:
    center = 0, 0
    adj_list = []

    def __init__(self, center):
        self.center = center
        self.adj_list = []

class Vertex:
        
    center = (0,0)
    adj_list = []
        
    def __init__(self, center):
        self.center = center
        self.adj_list = []