class seat:
    def __init__(self, id, score):
        self.sold = 0  # Number of times this seat has been sold
        self.id = id   # Seat id number (written on the seat in the theatre hall)
        self.score = score #

    def __str__(self):
        return "seat(id:%s,score:%s,sold:%s)" % (self.id, self.score, self.sold)

    def __repr__(self):
        return str(self)

    def pp(self):
        return str(self)

    def __cmp__(self, other):
        return cmp(other.score, self.score)

class hall:
    def __init__(self, rows):
        self.rows = rows

    def __str__(self):
        return "hall(rows:%s)" % self.rows

    def __repr__(self):
        return str(self)

    def pp(self):
        """Return hall as a pretty string"""
        res = "hall("
        for r in self.rows:
            res += "\n  %s" % r.pp()

        res += "\n)"
        return res

class row:
    def __init__(self, id, seats):
        self.id = id
        self.seats = []
        self.vacant = 0
        for s in seats:
            self.seats.append(s)
            self.vacant += 1

    def __str__(self):
        return "row(id:%s,seats:%s,vacant:%s)" % (self.id, self.seats, self.vacant)

    def __repr__(self):
        return str(self)

    def next_available(self):
        return len(self.seats) - self.vacant

    def pp(self):
        res = "row( id: %s, vacant: %s, " % (self.id, self.vacant)
        for s in self.seats:
            res += "\n    %s" % (s.pp())
        res += "\n  )"
        return res

class reservation:
    def __init__(self, id, len):
        self.len = len
        self.id = id
        self.seats = []

    def __str__(self):
        return "reservation(len:%s,seats:%s)" % (self.len, self.seats)

    def __repr__(self):
        return str(self)

    def pp(self):
        res = "reservation(id: %s, len: %s" % (self.id, self.len)
        for s in self.seats:
            res += "\n  %s" % s.pp()
        res += "\n)"
        return res