


"""simple docstring"""







from __future__ import annotations






class 		_A    :







    """simple docstring"""




    def __init__(   self							:       int							,					__UpperCAmelCase							:       Union[str, Any]):
      a		:						Optional[int] 				=     data
      a		:						str 				=     None






class 		_A    :







    """simple docstring"""




    def __init__(   self							:       str):
      a		:						List[Any] 				=     None






    def       __snake_case				(   self							:       Tuple							,					__UpperCAmelCase							:       Optional[int]):
      a		:						str 				=     Node(UpperCamelCase__)
      a		:						Tuple 				=     self.head
      a		:						Optional[Any] 				=     new_node
      return self.head.data






    def       __snake_case				(   self							:       Tuple):
      a		:						Union[str, Any] 				=     self.head
      a		:						Dict 				=     self.head
      if self.head:
        while fast_pointer and fast_pointer.next:
          a		:						int 				=     fast_pointer.next.next
          a		:						Dict 				=     slow_pointer.next
        return slow_pointer.data
      else:
        print("No element found.")
        return None


if __name__ == "__main__":
 __lowercase          = LinkedList()
 for _ in range(int(input().strip())):
  __lowercase          = int(input().strip())
  link.push(data)
 print(link.middle_element())














from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available


A										=      {'configuration_detr': ['DETR_PRETRAINED_CONFIG_ARCHIVE_MAP', 'DetrConfig', 'DetrOnnxConfig']}

try:
				if not is_vision_available():
								raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
				pass
else:
				A										=      ['DetrFeatureExtractor']
				A										=      ['DetrImageProcessor']

try:
				if not is_torch_available():
								raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
				pass
else:
				A										=      [
				    'DETR_PRETRAINED_MODEL_ARCHIVE_LIST',
				    'DetrForObjectDetection',
				    'DetrForSegmentation',
				    'DetrModel',
				    'DetrPreTrainedModel',
				]


if TYPE_CHECKING:
				from .configuration_detr import DETR_PRETRAINED_CONFIG_ARCHIVE_MAP, DetrConfig, DetrOnnxConfig

				try:
								if not is_vision_available():
												raise OptionalDependencyNotAvailable()
				except OptionalDependencyNotAvailable:
								pass
				else:
								from .feature_extraction_detr import DetrFeatureExtractor
								from .image_processing_detr import DetrImageProcessor

				try:
								if not is_torch_available():
												raise OptionalDependencyNotAvailable()
				except OptionalDependencyNotAvailable:
								pass
				else:
								from .modeling_detr import (
								    DETR_PRETRAINED_MODEL_ARCHIVE_LIST,
								    DetrForObjectDetection,
								    DetrForSegmentation,
								    DetrModel,
								    DetrPreTrainedModel,
								)

else:
				import sys

				A										=      _LazyModule(__name__, globals()['__file__'], _import_structure, module_spec=__spec__)