def      a__ (		__UpperCamelCase     ,      __UpperCamelCase				):
      if mass < 0:
            raise ValueError("The mass of a body cannot be negative"				)
      return 0.5 * mass * abs(__UpperCamelCase				) * abs(__UpperCamelCase				)


if __name__ == "__main__":
      import doctest

      doctest.testmod(verbose=True)



from math import factorial


def      a__ (		__UpperCamelCase = 1_0_0				):
      return sum(int(__UpperCamelCase				) for x in str(factorial(__UpperCamelCase				)				)				)


if __name__ == "__main__":
      print(solution(int(input("Enter the Number: ").strip())))


