'''simple docstring'''




import inspect
import os
import unittest

import torch

import accelerate
from accelerate import debug_launcher
from accelerate.test_utils import (
    execute_subprocess_async,
    require_cpu,
    require_multi_gpu,
    require_single_gpu,
    test_sync,
)
from accelerate.utils import patch_environment


class    UpperCAmelCase__	(							unittest.TestCase      ):






   """simple docstring"""
   def 		_lowerCamelCase			(self					)     ->  int:
        lowercase_       :							str  					=       inspect.getfile(accelerate.test_utils					)
        lowercase_       :							Any  					=       os.path.sep.join(mod_file.split(os.path.sep					)[:-1] + ['scripts', 'test_sync.py']					)
   @require_cpu
   def 		_lowerCamelCase			(self					)     ->  Any:
        debug_launcher(test_sync.main							,					num_processes=1					)
   @require_cpu
   def 		_lowerCamelCase			(self					)     ->  Any:
        debug_launcher(test_sync.main					)
   @require_single_gpu
   def 		_lowerCamelCase			(self					)     ->  List[str]:
        test_sync.main()





   @require_multi_gpu
   def 		_lowerCamelCase			(self					)     ->  str:
        print(f'''Found {torch.cuda.device_count()} devices.'''					)
        lowercase_       :							int  					=       ['torchrun', f'''--nproc_per_node={torch.cuda.device_count()}''', self.test_file_path]
        with patch_environment(omp_num_threads=1					):
             execute_subprocess_async(_a							,					env=os.environ.copy()					)





'''simple docstring'''




def _UpperCamelCase (							SCREAMING_SNAKE_CASE_ = 1_000				):
     lowercase_       :							Tuple  					=       [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_       :							Optional[Any]  					=       0

     for i in range(1	,							n + 1				):
          if i < 1_000:
               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 // 1_000] + 8
     return count


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




