def test_brute():
inc = lambda x: x+1
dec = lambda x: x-1
square = lambda x: x**2
tree = ([inc, dec], square)
fn = brute(tree, lambda x: -x)
assert fn(2) == (2 + 1)**2
assert fn(-2) == (-2 - 1)**2
assert brute(inc)(1) == 2
def test_brute():
inc = lambda x: x + 1
dec = lambda x: x - 1
square = lambda x: x**2
tree = ([inc, dec], square)
fn = brute(tree, lambda x: -x)
assert fn(2) == (2 + 1)**2
assert fn(-2) == (-2 - 1)**2
assert brute(inc)(1) == 2