

def _a			(	SCREAMING_SNAKE_CASE		:      List[Any]   , SCREAMING_SNAKE_CASE		:      int		)   ->   Any:

 """simple docstring"""






 if len(str(SCREAMING_SNAKE_CASE		)		) == 1 or len(str(SCREAMING_SNAKE_CASE		)		) == 1:
  return a * b

 __lowerCAmelCase:       Optional[Any]            =				max(len(str(SCREAMING_SNAKE_CASE		)		)   , len(str(SCREAMING_SNAKE_CASE		)		)		)
 __lowerCAmelCase:       Dict            =				ma // 2

 __lowerCAmelCase     ,							__lowerCAmelCase:       Dict            =				divmod(SCREAMING_SNAKE_CASE   , 10**ma		)
 __lowerCAmelCase     ,							__lowerCAmelCase:       Union[str, Any]            =				divmod(SCREAMING_SNAKE_CASE   , 10**ma		)

 __lowerCAmelCase:       Dict            =				karatsuba(SCREAMING_SNAKE_CASE   , SCREAMING_SNAKE_CASE		)
 __lowerCAmelCase:       Tuple            =				karatsuba((aa + aa)   , (ba + ba)		)
 __lowerCAmelCase:       Dict            =				karatsuba(SCREAMING_SNAKE_CASE   , SCREAMING_SNAKE_CASE		)

 return (z * 10 ** (2 * ma)) + ((y - z - x) * 10 ** (ma)) + (x)







def _a			(	)   ->   Any:

 """simple docstring"""






 print(karatsuba(1_54_63   , 2_34_89		)		)


if __name__ == "__main__":
  main()








def _a			(	SCREAMING_SNAKE_CASE		:      int = 10_00		)   ->   int:

 """simple docstring"""






 __lowerCAmelCase:       Union[str, Any]            =				[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)
 __lowerCAmelCase:       Union[str, Any]            =				[0, 0, 6, 6, 5, 5, 5, 7, 6, 6]

 __lowerCAmelCase:       Optional[int]            =				0

 for i in range(1   , n + 1		):
  if i < 10_00:
   if i >= 1_00:
    # add number of letters for "n hundred"
    count += ones_counts[i // 1_00] + 7

    if i % 1_00 != 0:
     # add number of letters for "and" if number is not multiple
     # of 100
     count += 3

   if 0 < i % 1_00 < 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 % 1_00]
   else:
    # add number of letters for twenty, twenty one, ..., ninety
    # nine
    count += ones_counts[i % 10]
    count += tens_counts[(i % 1_00 - i % 10) // 10]
  else:
   count += ones_counts[i // 10_00] + 8
 return count


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





