






'''simple docstring'''
import os

try:
  from .build_directory_md import good_file_paths
except ImportError:
  from build_directory_md import good_file_paths  # type: ignore

a_ 		=       list(good_file_paths())
assert filepaths, "good_file_paths() failed!"

a_ 		=       [file for file in filepaths if file != file.lower()]
if upper_files:
  print(F'''{len(upper_files)} files contain uppercase characters:''')
  print('\n'.join(upper_files) + '\n')

a_ 		=       [file for file in filepaths if ' ' in file]
if space_files:
  print(F'''{len(space_files)} files contain space characters:''')
  print('\n'.join(space_files) + '\n')

a_ 		=       [file for file in filepaths if '-' in file]
if hyphen_files:
  print(F'''{len(hyphen_files)} files contain hyphen characters:''')
  print('\n'.join(hyphen_files) + '\n')

a_ 		=       [file for file in filepaths if os.sep not in file]
if nodir_files:
  print(F'''{len(nodir_files)} files are not in a directory:''')
  print('\n'.join(nodir_files) + '\n')

a_ 		=       len(upper_files + space_files + hyphen_files + nodir_files)
if bad_files:
  import sys

  sys.exit(bad_files)


def      a      (			A__	:   int = 1000000     )    ->      int:





      """simple docstring"""



      _lowercase	       =1
      _lowercase	       =1
      _lowercase	       ={1: 1}

      for inputa in range(2      ,   A__     ):
            _lowercase	       =0
            _lowercase	       =inputa

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

            if inputa not in counters:
                  _lowercase	       =counter

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


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


