def test_example6():
num = -5
expected = -55
actual = maximum_possible_value(num)
assert actual == expected
def test_example():
num = 268
expected = 5268
actual = maximum_possible_value(num)
assert actual == expected
def test_example4():
num = -999
expected = -5999
actual = maximum_possible_value(num)
assert actual == expected
def test_example3():
num = 0
expected = 50
actual = maximum_possible_value(num)
assert actual == expected