






import math






def     _snake_case    (__lowercase    ,      __lowercase):

   if initial_intensity < 0:
      raise ValueError('The value of intensity cannot be negative')
      # handling of negative values of initial intensity
   if angle < 0 or angle > 360:
      raise ValueError('In Malus Law, the angle is in the range 0-360 degrees')
      # handling of values out of allowed range
   return initial_intensity * (math.cos(math.radians(__lowercase)) ** 2)


if __name__ == "__main__":
 import doctest

 doctest.testmod(name="""malus_law""")













def     _snake_case    (__lowercase = 1000):
   UpperCamelCase_		,      UpperCamelCase_									=     1, 1
   UpperCamelCase_									=     2
   while True:
      UpperCamelCase_									=     0
      UpperCamelCase_									=     fa + fa
      UpperCamelCase_		,      UpperCamelCase_									=     fa, f
      index += 1
      for _ in str(__lowercase):
         i += 1
      if i == n:
         break
   return index


if __name__ == "__main__":
 print(solution(int(str(input()).strip())))





