def __init__(self, meno_suboru):
        self.graf = dict()
        with open(meno_suboru,"r") as file:
            for riadok in file:
                item = riadok.strip().split(":")
                if len(item) == 2:
                    v1,v2 = item
                    if v1 not in self.graf:
                        self.graf[v1] = {v2}
                    else:
                        self.graf[v1][v2]
                else:
                    v1,d,v2 = item
                    if v1 not in self.graf:
                        self.graf[v1] = {v2:d}
                    else:
                        self.graf[v1][v2] = d