>>> from polinomis import Polinomi
>>> from opera_polinomis import iter_graumaxim

--ini-enunciat

>>> p = Polinomi()
>>> p[3], p[1], p[0] = 2, -1, 4
>>> q = Polinomi()
>>> q[5], q[2], q[1] = 9, -5, 7
>>> r = Polinomi()
>>> r[7], r[3], r[2], r[1], r[0] = 7, 9, -5, 7, 13
>>> it = iter_graumaxim([p, q, r])
>>> next(it), next(it), next(it)
(3, 5, 7)

--fi-enunciat
>>> r[7], r[5] = 0, 7
>>> s = Polinomi()
>>> s[2], s[1], s[0] = -2, -5, 7
>>> t = Polinomi()
>>> t[3], t[1], t[0] = -5, 7, -1
>>> u = Polinomi()
>>> u[4], u[0] = -5, -4

>>> it = iter_graumaxim([p, q, r, s, t, u])
>>> it == iter(it)
True
>>> next(it)
3
>>> list(it)
[5, 5, 2, 3, 4]
>>> p[6] = 9
>>> it = iter_graumaxim([p, q, r, s])
>>> list(it)
[6, 5, 5, 2]