>>> from arbres_intervals import classifica_interval

--inici--

>>> i = -2, 2
>>> classifica_interval(i, -3)
1
>>> classifica_interval(i, -2)
0
>>> classifica_interval(i, 0)
0
>>> classifica_interval(i, 2)
0
>>> classifica_interval(i, 5)
-1

--fi--

>>> i = 15, 20
>>> classifica_interval(i, 10)
1
>>> classifica_interval(i, 15)
0
>>> classifica_interval(i, 18)
0
>>> classifica_interval(i, 20)
0
>>> classifica_interval(i, 21)
-1

>>> i = -2, 2
>>> classifica_interval(i, -3.5)
1
>>> classifica_interval(i, -2)
0
>>> classifica_interval(i, 0.5)
0
>>> classifica_interval(i, 2)
0
>>> classifica_interval(i, 5.5)
-1

>>> i = 1.5, 2
>>> classifica_interval(i, 1)
1
>>> classifica_interval(i, 1.5)
0
>>> classifica_interval(i, 1.8)
0
>>> classifica_interval(i, 2.0)
0
>>> classifica_interval(i, 2.1)
-1