






"""simple docstring"""





import argparse
import os
import re


# All paths are set with the intent you should run this script from the root of the repo with the command
# python utils/check_dummies.py
A__       :			Tuple=						"""src/transformers"""

# Matches is_xxx_available()
A__       :			Optional[Any]=						re.compile(r"""is\_([a-z_]*)_available()""")
# Matches from xxx import bla
A__       :			Any=						re.compile(r"""\s+from\s+\S*\s+import\s+([^\(\s].*)\n""")
A__       :			Optional[int]=						re.compile(r"""^\s+if\s+not\s+\(?is\_[a-z_]*\_available\(\)""")


A__       :			Tuple=						"""\n{0} = None\n"""

A__       :			Any=						"""\nclass {0}(metaclass=DummyObject):\n    _backends = {1}\n\n    def __init__(self, *args, **kwargs):\n        requires_backends(self, {1})\n"""


A__       :			List[Any]=						"""\ndef {0}(*args, **kwargs):\n    requires_backends({0}, {1})\n"""







def 	lowerCAmelCase_(			SCREAMING_SNAKE_CASE       )       ->						int:
    """simple docstring"""

    if _re_test_backend.search(lowerCAmelCase_       ) is None:
        return None
    UpperCamelCase__								=     [b[0] for b in _re_backend.findall(lowerCAmelCase_       )]
    backends.sort()
    return "_and_".join(lowerCAmelCase_       )







def 	lowerCAmelCase_(			)       ->						Any:
    """simple docstring"""

    with open(os.path.join(lowerCAmelCase_			,						'__init__.py'       )			,						'r'			,						encoding='utf-8'			,						newline='\n'       ) as f:
        UpperCamelCase__								=     f.readlines()

    # Get to the point we do the actual imports for type checking
    UpperCamelCase__								=     0
    while not lines[line_index].startswith('if TYPE_CHECKING'       ):
        line_index += 1

    UpperCamelCase__								=     {}
    # Go through the end of the file
    while line_index < len(lowerCAmelCase_       ):
        # If the line is an if is_backend_available, we grab all objects associated.
        UpperCamelCase__								=     find_backend(lines[line_index]       )
        if backend is not None:
            while not lines[line_index].startswith('    else:'       ):
                line_index += 1
            line_index += 1

            UpperCamelCase__								=     []
            # Until we unindent, add backend objects to the list
            while len(lines[line_index]       ) <= 1 or lines[line_index].startswith(' ' * 8       ):
                UpperCamelCase__								=     lines[line_index]
                UpperCamelCase__								=     _re_single_line_import.search(lowerCAmelCase_       )
                if single_line_import_search is not None:
                    objects.extend(single_line_import_search.groups()[0].split(', '       )       )
                elif line.startswith(' ' * 12       ):
                    objects.append(line[12:-2]       )
                line_index += 1

            UpperCamelCase__								=     objects
        else:
            line_index += 1

    return backend_specific_objects







def 	lowerCAmelCase_(			SCREAMING_SNAKE_CASE			,						SCREAMING_SNAKE_CASE       )       ->						List[str]:
    """simple docstring"""

    if name.isupper():
        return DUMMY_CONSTANT.format(lowerCAmelCase_       )
    elif name.islower():
        return DUMMY_FUNCTION.format(lowerCAmelCase_			,						lowerCAmelCase_       )
    else:
        return DUMMY_CLASS.format(lowerCAmelCase_			,						lowerCAmelCase_       )







def 	lowerCAmelCase_(			SCREAMING_SNAKE_CASE=None       )       ->						List[Any]:
    """simple docstring"""

    if backend_specific_objects is None:
        UpperCamelCase__								=     read_init()
    # For special correspondence backend to module name as used in the function requires_modulename
    UpperCamelCase__								=     {}

    for backend, objects in backend_specific_objects.items():
        UpperCamelCase__								=     '[' + ', '.join(F'"{b}"' for b in backend.split('_and_'       )       ) + ']'
        UpperCamelCase__								=     '# This file is autogenerated by the command `make fix-copies`, do not edit.\n'
        dummy_file += "from ..utils import DummyObject, requires_backends\n\n"
        dummy_file += "\n".join([create_dummy_object(lowerCAmelCase_			,						lowerCAmelCase_       ) for o in objects]       )
        UpperCamelCase__								=     dummy_file

    return dummy_files







def 	lowerCAmelCase_(			SCREAMING_SNAKE_CASE=False       )       ->						Optional[Any]:
    """simple docstring"""

    UpperCamelCase__								=     create_dummy_files()
    # For special correspondence backend to shortcut as used in utils/dummy_xxx_objects.py
    UpperCamelCase__								=     {'torch': 'pt'}

    # Locate actual dummy modules and read their content.
    UpperCamelCase__								=     os.path.join(lowerCAmelCase_			,						'utils'       )
    UpperCamelCase__								=     {
        backend: os.path.join(lowerCAmelCase_			,						F'dummy_{short_names.get(lowerCAmelCase_			,						lowerCAmelCase_       )}_objects.py'       )
        for backend in dummy_files.keys()
    }

    UpperCamelCase__								=     {}
    for backend, file_path in dummy_file_paths.items():
        if os.path.isfile(lowerCAmelCase_       ):
            with open(lowerCAmelCase_			,						'r'			,						encoding='utf-8'			,						newline='\n'       ) as f:
                UpperCamelCase__								=     f.read()
        else:
            UpperCamelCase__								=     ''

    for backend in dummy_files.keys():
        if dummy_files[backend] != actual_dummies[backend]:
            if overwrite:
                print(
                    F'Updating transformers.utils.dummy_{short_names.get(lowerCAmelCase_			,						lowerCAmelCase_       )}_objects.py as the main '
                    '__init__ has new objects.'       )
                with open(dummy_file_paths[backend]			,						'w'			,						encoding='utf-8'			,						newline='\n'       ) as f:
                    f.write(dummy_files[backend]       )
            else:
                raise ValueError(
                    'The main __init__ has objects that are not present in '
                    F'transformers.utils.dummy_{short_names.get(lowerCAmelCase_			,						lowerCAmelCase_       )}_objects.py. Run `make fix-copies` '
                    'to fix this.'       )


if __name__ == "__main__":
  A__       :			Optional[Any]=						argparse.ArgumentParser()
  parser.add_argument("""--fix_and_overwrite""", action="""store_true""", help="""Whether to fix inconsistencies.""")
  A__       :			Optional[int]=						parser.parse_args()

  check_dummies(args.fix_and_overwrite)







from __future__ import annotations

_lowerCamelCase							={1: 1}







def      snake_case__							(  lowerCAmelCase_     ):





     """simple docstring"""







     if n in COLLATZ_SEQUENCE_LENGTHS:
          return COLLATZ_SEQUENCE_LENGTHS[n]
     SCREAMING_SNAKE_CASE 		=n // 2 if n % 2 == 0 else 3 * n + 1
     SCREAMING_SNAKE_CASE 		=collatz_sequence_length(lowerCAmelCase_     ) + 1
     SCREAMING_SNAKE_CASE 		=sequence_length
     return sequence_length







def      snake_case__							(  lowerCAmelCase_ = 1000000     ):





     """simple docstring"""







     SCREAMING_SNAKE_CASE 		=max((collatz_sequence_length(lowerCAmelCase_     ), i) for i in range(1,       lowerCAmelCase_     )     )
     return result[1]


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

