solution.py

# A child is playing with a ball on the nth floor of a tall building.
# The height of this floor, h, is known.
# He drops the ball out of the window.
# The ball bounces (for example), to two-thirds of its height (a bounce of 0.66).

# His mother looks out of a window 1.5 meters from the ground.
# How many times will the mother see the ball pass in front of her window (including when it's falling and bouncing?

# Three conditions must be met for a valid experiment:
# Float parameter "h" in meters must be greater than 0
# Float parameter "bounce" must be greater than 0 and less than 1
# Float parameter "window" must be less than h.
# If all three conditions above are fulfilled, return a positive integer, otherwise return -1.

# Note:
# The ball can only be seen if the height of the rebounding ball is strictly greater than the window parameter.


def bouncingBall(h, bounce, window):
    r = -1

    if 0 < bounce < 1:
        while h > window:
            r += 2
            h *= bounce

    return r