


import argparse
import importlib
from pathlib import Path


# Test all the extensions added in the setup
SCREAMING_SNAKE_CASE							    =							[
    'kernels/rwkv/wkv_cuda.cu',
    'kernels/rwkv/wkv_op.cpp',
    'kernels/deformable_detr/ms_deform_attn.h',
    'kernels/deformable_detr/cuda/ms_deform_im2col_cuda.cuh',
    'models/graphormer/algos_graphormer.pyx',
]




def  a   (lowerCAmelCase__   ):
   # Test all the extensions added in the setup
   for file in FILES_TO_FIND:
      if not (transformers_path / file).exists():
         return False
   return True


if __name__ == "__main__":
  SCREAMING_SNAKE_CASE							    =							argparse.ArgumentParser()
  parser.add_argument('--check_lib', action='store_true', help='Whether to check the build or the actual package.')
  SCREAMING_SNAKE_CASE							    =							parser.parse_args()
  if args.check_lib:
    SCREAMING_SNAKE_CASE							    =							importlib.import_module('transformers')
    SCREAMING_SNAKE_CASE							    =							Path(transformers_module.__file__).parent
  else:
    SCREAMING_SNAKE_CASE							    =							Path.cwd() / 'build/lib/transformers'
  if not test_custom_files_are_present(transformers_path):
    raise ValueError('The built release does not contain the custom files. Fix this before going further!')







def  a   (lowerCAmelCase__ = 1_000_000   ):
   __a					=  1
   __a					=  1
   __a					=  {1: 1}

   for inputa in range(2		,				lowerCAmelCase__   ):
      __a					=  0
      __a					=  inputa

      while True:
         if number in counters:
            counter += counters[number]
            break
         if number % 2 == 0:
            number //= 2
            counter += 1
         else:
            __a					=  (3 * number) + 1
            counter += 1

      if inputa not in counters:
         __a					=  counter

      if counter > pre_counter:
         __a					=  inputa
         __a					=  counter
   return largest_number


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



