def calculate_depth_increases(depth_windows: list[int]) -> int:
    """Calculates the number of times the depth increases, compared to the previous depth band"""
    depth_increases: int = 0
    for index, window in enumerate(depth_windows):
        if index == 0:
            continue
        else:
            if window > depth_windows[index - 1]:
                depth_increases += 1
    return depth_increases