class Node:

    def __init__(self, dst = -1, cost = -1):

        self.dst = dst

        self.cost = cost

        self.link = None





def image_to_graph(image):

    print("ssss\n")

    header = Node()

    header.link = Node(1,1)

    header.link.link = Node(2,2)



    p = header



    while( p != None):

        print(" :", p.dst, p.cost, "\n")

        p = p.link



    print(" end\n")



image_to_graph(None)