def running_start(t: float, pull_factor: float=(- 0.5)) -> float:
    return bezier([0, 0, pull_factor, pull_factor, 1, 1, 1])(t)
def running_start(t: float, pull_factor: float=(- 0.5)) -> float:
    return bezier([0, 0, pull_factor, pull_factor, 1, 1, 1])(t)