





from math import pi, sqrt, tan






def lowerCamelCase__   (							snake_case_     :  float	)				->    float:
   if side_length < 0:
      raise ValueError('''surface_area_cube() only accepts non-negative values'''	)
   return 6 * side_length**2






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if length < 0 or breadth < 0 or height < 0:
      raise ValueError('''surface_area_cuboid() only accepts non-negative values'''	)
   return 2 * ((length * breadth) + (breadth * height) + (length * height))






def lowerCamelCase__   (							snake_case_     :  float	)				->    float:
   if radius < 0:
      raise ValueError('''surface_area_sphere() only accepts non-negative values'''	)
   return 4 * pi * radius**2






def lowerCamelCase__   (							snake_case_     :  float	)				->    float:
   if radius < 0:
      raise ValueError('''surface_area_hemisphere() only accepts non-negative values'''	)
   return 3 * pi * radius**2






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if radius < 0 or height < 0:
      raise ValueError('''surface_area_cone() only accepts non-negative values'''	)
   return pi * radius * (radius + (height**2 + radius**2) ** 0.5)






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if radius_a < 0 or radius_a < 0 or height < 0:
      raise ValueError(
          '''surface_area_conical_frustum() only accepts non-negative values'''	)
   __snake_case								=       (height**2 + (radius_a - radius_a) ** 2) ** 0.5
   return pi * ((slant_height * (radius_a + radius_a)) + radius_a**2 + radius_a**2)






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if radius < 0 or height < 0:
      raise ValueError('''surface_area_cylinder() only accepts non-negative values'''	)
   return 2 * pi * radius * (height + radius)






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if torus_radius < 0 or tube_radius < 0:
      raise ValueError('''surface_area_torus() only accepts non-negative values'''	)
   if torus_radius < tube_radius:
      raise ValueError(
          '''surface_area_torus() does not support spindle or self intersecting tori'''	)
   return 4 * pow(UpperCamelCase__	,				2	) * torus_radius * tube_radius






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if length < 0 or width < 0:
      raise ValueError('''area_rectangle() only accepts non-negative values'''	)
   return length * width






def lowerCamelCase__   (							snake_case_     :  float	)				->    float:
   if side_length < 0:
      raise ValueError('''area_square() only accepts non-negative values'''	)
   return side_length**2






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if base < 0 or height < 0:
      raise ValueError('''area_triangle() only accepts non-negative values'''	)
   return (base * height) / 2






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if sidea < 0 or sidea < 0 or sidea < 0:
      raise ValueError('''area_triangle_three_sides() only accepts non-negative values'''	)
   elif sidea + sidea < sidea or sidea + sidea < sidea or sidea + sidea < sidea:
      raise ValueError('''Given three sides do not form a triangle'''	)
   __snake_case								=       (sidea + sidea + sidea) / 2
   __snake_case								=       sqrt(
       semi_perimeter
       * (semi_perimeter - sidea)
       * (semi_perimeter - sidea)
       * (semi_perimeter - sidea)	)
   return area






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if base < 0 or height < 0:
      raise ValueError('''area_parallelogram() only accepts non-negative values'''	)
   return base * height






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if basea < 0 or basea < 0 or height < 0:
      raise ValueError('''area_trapezium() only accepts non-negative values'''	)
   return 1 / 2 * (basea + basea) * height






def lowerCamelCase__   (							snake_case_     :  float	)				->    float:
   if radius < 0:
      raise ValueError('''area_circle() only accepts non-negative values'''	)
   return pi * radius**2






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if radius_x < 0 or radius_y < 0:
      raise ValueError('''area_ellipse() only accepts non-negative values'''	)
   return pi * radius_x * radius_y






def lowerCamelCase__   (							snake_case_     :  float	,				snake_case_     :  float	)				->    float:
   if diagonal_a < 0 or diagonal_a < 0:
      raise ValueError('''area_rhombus() only accepts non-negative values'''	)
   return 1 / 2 * diagonal_a * diagonal_a






def lowerCamelCase__   (							snake_case_     :  int	,				snake_case_     :  float	)				->    float:
   if not isinstance(UpperCamelCase__	,				UpperCamelCase__	) or sides < 3:
      raise ValueError(
          '''area_reg_polygon() only accepts integers greater than or \
equal to three as number of sides'''	)
   elif length < 0:
      raise ValueError(
          '''area_reg_polygon() only accepts non-negative values as \
length of a side'''	)
   return (sides * length**2) / (4 * tan(pi / sides	))
   return (sides * length**2) / (4 * tan(pi / sides	))


if __name__ == "__main__":
    import doctest

    doctest.testmod(verbose=True)  # verbose so we can see methods missing tests

    print('[DEMO] Areas of various geometric shapes: \n')
    print(F'Rectangle: {area_rectangle(10, 20) = }')
    print(F'Square: {area_square(10) = }')
    print(F'Triangle: {area_triangle(10, 10) = }')
    print(F'Triangle: {area_triangle_three_sides(5, 12, 13) = }')
    print(F'Parallelogram: {area_parallelogram(10, 20) = }')
    print(F'Rhombus: {area_rhombus(10, 20) = }')
    print(F'Trapezium: {area_trapezium(10, 20, 30) = }')
    print(F'Circle: {area_circle(20) = }')
    print(F'Ellipse: {area_ellipse(10, 20) = }')
    print('\nSurface Areas of various geometric shapes: \n')
    print(F'Cube: {surface_area_cube(20) = }')
    print(F'Cuboid: {surface_area_cuboid(10, 20, 30) = }')
    print(F'Sphere: {surface_area_sphere(20) = }')
    print(F'Hemisphere: {surface_area_hemisphere(20) = }')
    print(F'Cone: {surface_area_cone(10, 20) = }')
    print(F'Conical Frustum: {surface_area_conical_frustum(10, 20, 30) = }')
    print(F'Cylinder: {surface_area_cylinder(10, 20) = }')
    print(F'Torus: {surface_area_torus(20, 10) = }')
    print(F'Equilateral Triangle: {area_reg_polygon(3, 10) = }')
    print(F'Square: {area_reg_polygon(4, 10) = }')
    print(F'Reqular Pentagon: {area_reg_polygon(5, 10) = }')










def lowerCamelCase__   (							snake_case_     :  int = 1000	)				->    int:
   __snake_case								=       2**power
   __snake_case								=       str(snake_case_	)
   __snake_case								=       list(snake_case_	)
   __snake_case								=       0

   for i in list_num:
      sum_of_num += int(snake_case_	)

   return sum_of_num


if __name__ == "__main__":
    snake_case_           =      int(input('Enter the power of 2: ').strip())
    print('2 ^ ', power, ' = ', 2**power)
    snake_case_           =      solution(power)
    print('Sum of the digits is: ', result)

