class   Tetel:
    def __init__   (self, f):
        self.lista = []
        f = f
        with open(f) as f:
            for l in f:
                    self.lista.append(int(l))

    def osszegez   (self):
        query   =  sum(self.lista)
        return     query

    def maxker     (self):
        query   =  max(self.lista)
        return     query

    def feltmaxker (self, f):
        query   =  max(filter(f, self.lista))
        return     query

    def szamlal    (self, f):
        query   =  filter(f, self.lista)
        return     query.__len__()