

import requests

try:
  from django.contrib.auth import authenticate, login
  from django.shortcuts import redirect, render
except ImportError:
  _a			=       _a			=       _a			=       _a			=       print







def _a			(	SCREAMING_SNAKE_CASE		:      int		)   ->   int:

 """simple docstring"""






 __lowerCAmelCase:       Tuple            =				'secretKey'
 __lowerCAmelCase:       Union[str, Any]            =				'https://www.google.com/recaptcha/api/siteverify'

 # when method is not POST, direct user to login page
 if request.method != "POST":
  return render(SCREAMING_SNAKE_CASE   , 'login.html'		)

 # from the frontend, get username, password, and client_key
 __lowerCAmelCase:       str            =				request.POST.get('username'		)
 __lowerCAmelCase:       Optional[Any]            =				request.POST.get('password'		)
 __lowerCAmelCase:       List[Any]            =				request.POST.get('g-recaptcha-response'		)

 # post recaptcha response to Google's recaptcha api
 __lowerCAmelCase:       str            =				requests.post(SCREAMING_SNAKE_CASE   , data={'secret': secret_key, 'response': client_key}		)
 # if the recaptcha api verified our keys
 if response.json().get('success'   , SCREAMING_SNAKE_CASE		):
  # authenticate the user
  __lowerCAmelCase:       int            =				authenticate(SCREAMING_SNAKE_CASE   , username=SCREAMING_SNAKE_CASE   , password=SCREAMING_SNAKE_CASE		)
  if user_in_database:
   login(SCREAMING_SNAKE_CASE   , SCREAMING_SNAKE_CASE		)
   return redirect('/your-webpage'		)
 return render(SCREAMING_SNAKE_CASE   , 'login.html'		)








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())))





