


"""simple docstring"""
from __future__ import annotations

import sys






def 						lowercase				(	_snake_case		: Union[str, Any]	)	->int:
	"""simple docstring"""





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






def 						lowercase				(	_snake_case		: Tuple	)	->tuple[int, 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
	__snake_case      :		List[str]         =							_fib(n // 2	)
	__snake_case      :		Dict         =							a * (b * 2 - a)
	__snake_case      :		Union[str, Any]         =							a * a + b * b
	return (d, c + d) if n % 2 else (c, d)


if __name__ == "__main__":
			SCREAMING_SNAKE_CASE					:       Optional[Any]							   =							int(sys.argv[1])
			print(F'fibonacci({n}) is {fibonacci(n)}')










'''simple docstring'''

def     __UpperCamelCase					(				_lowercase = 1000       )			->      int:
	_lowercase       :							Optional[int]  	=		[0, 3, 3, 5, 4, 4, 3, 5, 5, 4, 3, 6, 6, 8, 8, 7, 7, 9, 8, 8]
	# number of letters in twenty, thirty, ..., ninety (0 for numbers less than
	# 20 due to inconsistency in teens)
	_lowercase       :							List[Any]  	=		[0, 0, 6, 6, 5, 5, 5, 7, 6, 6]

	_lowercase       :							Any  	=		0

	for i in range(1,					n + 1       ):
		if i < 1000:
			if i >= 100:
				# add number of letters for "n hundred"
				count += ones_counts[i // 100] + 7

				if i % 100 != 0:
					# add number of letters for "and" if number is not multiple
					# of 100
					count += 3

			if 0 < i % 100 < 20:
				# add number of letters for one, two, three, ..., nineteen
				# (could be combined with below if not for inconsistency in
				# teens)
				count += ones_counts[i % 100]
			else:
				# add number of letters for twenty, twenty one, ..., ninety
				# nine
				count += ones_counts[i % 10]
				count += tens_counts[(i % 100 - i % 10) // 10]
		else:
			count += ones_counts[i // 1000] + 8
	return count


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