


from __future__ import annotations

snake_case_						:			str													=							1.60_21e-19  # units = C







def 						lowerCamelCase(   a__	,a__	,a__	,):
				if (conductivity, electron_conc, mobility).count(0) != 1:
								raise ValueError('''You cannot supply more or less than 2 values''')
				elif conductivity < 0:
								raise ValueError('''Conductivity cannot be negative''')
				elif electron_conc < 0:
								raise ValueError('''Electron concentration cannot be negative''')
				elif mobility < 0:
								raise ValueError('''mobility cannot be negative''')
				elif conductivity == 0:
								return (
								    "conductivity",
								    mobility * electron_conc * ELECTRON_CHARGE,
								)
				elif electron_conc == 0:
								return (
								    "electron_conc",
								    conductivity / (mobility * ELECTRON_CHARGE),
								)
				else:
								return (
								    "mobility",
								    conductivity / (electron_conc * ELECTRON_CHARGE),
								)


if __name__ == "__main__":
							import doctest

							doctest.testmod()



from collections.abc import Generator







def 						lowerCamelCase(   ):
				_SCREAMING_SNAKE_CASE  ,				_SCREAMING_SNAKE_CASE			  =0, 1
				while True:
								_SCREAMING_SNAKE_CASE  ,				_SCREAMING_SNAKE_CASE			  =b, a + b
								yield b







def 						lowerCamelCase(   a__ = 1000):
				_SCREAMING_SNAKE_CASE			  =1
				_SCREAMING_SNAKE_CASE			  =fibonacci_generator()
				while len(str(next(a__))) < n:
								answer += 1
				return answer + 1


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