'''simple docstring'''





import sys






def SCREAMING_SNAKE_CASE__  (				snake_case       :				Any				,	snake_case       :				Dict  )   ->				int:







     """simple docstring"""
     if not numbers:
          return 0
     if target == 0 and target in numbers:
          return 0
     if not isinstance(_lowercase				,	(list, tuple)  ) or not all(
         isinstance(_lowercase				,	_lowercase  ) for number in numbers  ):
          raise ValueError('numbers must be an iterable of integers'  )

     a					:							Tuple							= 0
     a					:							Tuple							= sys.maxsize

     while right < len(_lowercase  ):
          curr_sum += numbers[right]
          while curr_sum >= target and left <= right:
               a					:							Dict							= min(_lowercase				,	right - left + 1  )
               curr_sum -= numbers[left]
               left += 1
          right += 1

     return 0 if min_len == sys.maxsize else min_len






'''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())))
