def test6():
expected = 0;
assert get_missing_num([]) == expected
def test5():
numbers = [ 0 ]
expected = 1
assert get_missing_num(numbers) == expected
def test1():
numbers = [ 1, 2, 3, 4, 5 ]
expected = 0
assert get_missing_num(numbers) == expected
def test4():
numbers = [ 1 ]
expected = 0
assert get_missing_num(numbers) == expected
def test3():
numbers = [ 0, 1, 2, 4, 5 ]
expected = 3
assert get_missing_num(numbers) == expected
def test2():
numbers = [ 0, 1, 2, 3, 4 ]
expected = 5
assert get_missing_num(numbers) == expected