>>> from itrect import interseccions
>>> from rectangles import Rectangle

>>> r0 = Rectangle(10, 20, 130, 140, 'roig')
>>> r1 = Rectangle(0, 10, 170, 80, 'blau')
>>> r2 = Rectangle(0, 25, 120, 180, 'taronja')
>>> r3 = Rectangle(40, 40, 200, 200, 'verd')
>>> r4 = Rectangle(50, 80, 100, 70, 'lila')

>>> it = iter([r0, r1, r2, r3, r4])
>>> for x in interseccions(it):  
...    print(x)  # Només intersecten r0 amb r1, r1 amb r2 i r2 amb r3
7200
6600
11200

>>> next(it, 'FINAL')
'FINAL'

--fi-enunciat

>>> it = iter([r0, r3, r2, r4, r1])
>>> for x in interseccions(it):  
...    print(x)
9000
11200

>>> it = iter([r0, r4, r1])  # Cas en què no intersequen els rectangles
>>> for x in interseccions(it):  
...    print(x)

>>> l = []
>>> l.append(Rectangle(16, 10, 26, 14, 'groc'))
>>> l.append(Rectangle(3, 5, 12, 11, 'carabassa'))
>>> l.append(Rectangle(17, 4, 25, 8, 'lila'))
>>> l.append(Rectangle(2, 9, 8, 13, 'marró'))
>>> l.append(Rectangle(17, 8, 27, 17, 'vermell'))
>>> l.append(Rectangle(10, 19, 17, 29, 'vermell'))
>>> l.append(Rectangle(8, 17, 12, 26, 'blau'))
>>> l.append(Rectangle(19, 15, 25, 19, 'marró'))
>>> l.append(Rectangle(20, 12, 30, 20, 'groc'))
>>> l.append(Rectangle(3, 18, 13, 24, 'blau'))
>>> l.append(Rectangle(11, 7, 17, 15, 'groc'))
>>> l.append(Rectangle(17, 13, 25, 22, 'marró'))
>>> l.append(Rectangle(1, 14, 9, 18, 'carabassa'))
>>> l.append(Rectangle(0, 4, 8, 13, 'marró'))
>>> l.append(Rectangle(2, 2, 8, 8, 'lila'))
>>> l.append(Rectangle(9, 10, 13, 18, 'verd'))
>>> l.append(Rectangle(4, 7, 12, 11, 'lila'))
>>> l.append(Rectangle(15, 7, 23, 12, 'verd'))
>>> l.append(Rectangle(11, 16, 17, 25, 'carabassa'))
>>> l.append(Rectangle(6, 17, 16, 23, 'vermell'))

>>> for x in interseccions(iter(l)):
...    print(x, end=',')
14,20,24,3,30,

>>> for x in interseccions(iter(l[::2])):
...    print(x, end=',')
4,

>>> for x in interseccions(iter(l+[r0,r2,r1,r4,r3])):
...    print(x, end=',')
14,20,24,3,30,18,12650,6600,