from __future__ import annotations

import sys




def 				_snake_case     (       lowerCAmelCase							:       int     ):
		"""simple docstring"""







		if n < 0:
				raise ValueError("Negative arguments are not supported"     )
		return _fib(lowerCAmelCase     )[0]




def 				_snake_case     (       lowerCAmelCase							:       int     ):
		"""simple docstring"""







		if n == 0:  # (F(0), F(1))
				return (0, 1)

		# F(2n) = F(n)[2F(n+1) − F(n)]
		# F(2n+1) = F(n+1)^2+F(n)^2
		SCREAMING_SNAKE_CASE_				,   SCREAMING_SNAKE_CASE_  :		Dict    				=   _fib(n // 2     )
		SCREAMING_SNAKE_CASE_  :		Optional[Any]    				=   a * (b * 2 - a)
		SCREAMING_SNAKE_CASE_  :		List[str]    				=   a * a + b * b
		return (d, c + d) if n % 2 else (c, d)


if __name__ == "__main__":
		__lowerCamelCase :     str          =  int(sys.argv[1])
		print(f'''fibonacci({n}) is {fibonacci(n)}''')

from __future__ import annotations

import sys




def 				_snake_case     (       lowerCAmelCase							:       int     ):
		"""simple docstring"""







		if n < 0:
				raise ValueError("Negative arguments are not supported"     )
		return _fib(lowerCAmelCase     )[0]




def 				_snake_case     (       lowerCAmelCase							:       int     ):
		"""simple docstring"""







		if n == 0:  # (F(0), F(1))
				return (0, 1)

		# F(2n) = F(n)[2F(n+1) − F(n)]
		# F(2n+1) = F(n+1)^2+F(n)^2
		SCREAMING_SNAKE_CASE_				,   SCREAMING_SNAKE_CASE_  :		Dict    				=   _fib(n // 2     )
		SCREAMING_SNAKE_CASE_  :		Optional[Any]    				=   a * (b * 2 - a)
		SCREAMING_SNAKE_CASE_  :		List[str]    				=   a * a + b * b
		return (d, c + d) if n % 2 else (c, d)


if __name__ == "__main__":
		__lowerCamelCase :     str          =  int(sys.argv[1])
		print(f'''fibonacci({n}) is {fibonacci(n)}''')
