x = 1
y = 2
z = 3

def p(x,y):
    return z*(x + y) 
    
def q(z): 
    global y
    if z <= 0:
        return y
    else: 
        x = p(y,z)
        y = 1 + q(z - x)
        return z - x*y 

def r(x):
    def p(y,z):
        global x      
        def q(y): 
            global z
            def r(z): 
                global y
                x = z + 1
                y = y + 2
                return x*y
            x = r(y)
            y = x + z
            z = y + z
            return z
        if y < z:
            return z
        else: 
            x = q(y) 
            y = r(x) 
            z = x*y # pos
            return p(-z, y)
    y = 2*x
    x = q(x)
    z = p(x,y)
    return z
    
def test_r():
    global x,y,z
    x=1
    y=2
    z=3
    return map (lambda i: (i, r(i)), range(-10,11))

''' The above should return the following:
In [11]: test_r()
Out[11]: 
[(-10, 36),
 (-9, 156),
 (-8, 492),
 (-7, 1296),
 (-6, 3072),
 (-5, 6828),
 (-4, 14580),
 (-3, 30360),
 (-2, 62232),
 (-1, 126324),
 (0, 254892),
 (1, 2),
 (2, 4),
 (3, 6),
 (4, 8),
 (5, 10),
 (6, 12),
 (7, 14),
 (8, 16),
 (9, 18),
 (10, 20)]
 '''