time: float = 0.0

# Initial assignments
a = 2
b = a + 1
c = b + 1
d = c + 1
e = d + 1
f = e + 1
y0 = []
variable_names = []


def model(time: float, variables: tuple[float, ...]) -> tuple[float, ...]:
    return


def derived(time: float, variables: tuple[float, ...]) -> dict[str, float]:
    b: float = a + 1
    d: float = c + 1
    f: float = e + 1
    return {
        "b": b,
        "d": d,
        "f": f,
    }
