code: 
  
  import os
  import sys
  
  from . import rsa_key_generator as rkg
  
  snake_case_    						=				128
  snake_case_    						=				256
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					str			,  SCREAMING_SNAKE_CASE_	:					int = DEFAULT_BLOCK_SIZE    ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       lowercase__					:     List[Any]   = message.encode('ascii'    )
  
       lowercase__					:     Dict   = []
       for block_start in range(0			,  len(SCREAMING_SNAKE_CASE_    )			,  SCREAMING_SNAKE_CASE_    ):
            lowercase__					:     int   = 0
            for i in range(SCREAMING_SNAKE_CASE_			,  min(block_start + block_size			,  len(SCREAMING_SNAKE_CASE_    )    )    ):
                 block_int += message_bytes[i] * (BYTE_SIZE ** (i % block_size))
            block_ints.append(SCREAMING_SNAKE_CASE_    )
       return block_ints
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					list[int]			,  SCREAMING_SNAKE_CASE_	:					int			,  SCREAMING_SNAKE_CASE_	:					int = DEFAULT_BLOCK_SIZE    ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       lowercase__					:     list[str]   = []
       for block_int in block_ints:
            lowercase__					:     list[str]   = []
            for i in range(block_size - 1			,  -1			,  -1    ):
                 if len(SCREAMING_SNAKE_CASE_    ) + i < message_length:
                      lowercase__					:     Optional[int]   = block_int // (BYTE_SIZE**i)
                      lowercase__					:     int   = block_int % (BYTE_SIZE**i)
                      block_message.insert(0			,  chr(SCREAMING_SNAKE_CASE_    )    )
            message.extend(SCREAMING_SNAKE_CASE_    )
       return "".join(SCREAMING_SNAKE_CASE_    )
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					str			,  SCREAMING_SNAKE_CASE_	:					tuple[int, int]			,  SCREAMING_SNAKE_CASE_	:					int = DEFAULT_BLOCK_SIZE    ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       lowercase__					:     List[str]   = []
       lowercase__					:     Optional[int]   = key
  
       for block in get_blocks_from_text(SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_    ):
            encrypted_blocks.append(pow(SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_    )    )
       return encrypted_blocks
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					list[int]			,  SCREAMING_SNAKE_CASE_	:					int			,  SCREAMING_SNAKE_CASE_	:					tuple[int, int]			,  SCREAMING_SNAKE_CASE_	:					int = DEFAULT_BLOCK_SIZE			,  ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       lowercase__					:     Optional[int]   = []
       lowercase__					:     Union[str, Any]   = key
       for block in encrypted_blocks:
            decrypted_blocks.append(pow(SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_    )    )
       return get_text_from_blocks(SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_    )
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					str    ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       with open(SCREAMING_SNAKE_CASE_    ) as fo:
            lowercase__					:     Dict   = fo.read()
       lowercase__					:     List[str]   = content.split(','    )
       return (int(SCREAMING_SNAKE_CASE_    ), int(SCREAMING_SNAKE_CASE_    ), int(SCREAMING_SNAKE_CASE_    ))
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					str			,  SCREAMING_SNAKE_CASE_	:					str			,  SCREAMING_SNAKE_CASE_	:					str			,  SCREAMING_SNAKE_CASE_	:					int = DEFAULT_BLOCK_SIZE			,  ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       lowercase__					:     List[str]   = read_key_file(SCREAMING_SNAKE_CASE_    )
       if key_size < block_size * 8:
            sys.exit(
                'ERROR: Block size is {} bits and key size is {} bits. The RSA cipher '
                'requires the block size to be equal to or greater than the key size. '
                'Either decrease the block size or use different keys.'.format(
                    block_size * 8			,  SCREAMING_SNAKE_CASE_    )    )
  
       lowercase__					:     Optional[Any]   = [str(SCREAMING_SNAKE_CASE_    ) for i in encrypt_message(SCREAMING_SNAKE_CASE_			,  (n, e)			,  SCREAMING_SNAKE_CASE_    )]
  
       lowercase__					:     List[str]   = ','.join(SCREAMING_SNAKE_CASE_    )
       lowercase__					:     Optional[int]   = f"""{len(SCREAMING_SNAKE_CASE_    )}_{block_size}_{encrypted_content}"""
       with open(SCREAMING_SNAKE_CASE_			,  'w'    ) as fo:
            fo.write(SCREAMING_SNAKE_CASE_    )
       return encrypted_content
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					str			,  SCREAMING_SNAKE_CASE_	:					str    ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       lowercase__					:     Tuple   = read_key_file(SCREAMING_SNAKE_CASE_    )
       with open(SCREAMING_SNAKE_CASE_    ) as fo:
            lowercase__					:     Dict   = fo.read()
       lowercase__					:     Optional[Any]   = content.split('_'    )
       lowercase__					:     Tuple   = int(SCREAMING_SNAKE_CASE_    )
       lowercase__					:     List[str]   = int(SCREAMING_SNAKE_CASE_    )
  
       if key_size < block_size * 8:
            sys.exit(
                'ERROR: Block size is {} bits and key size is {} bits. The RSA cipher '
                'requires the block size to be equal to or greater than the key size. '
                'Did you specify the correct key file and encrypted file?'.format(
                    block_size * 8			,  SCREAMING_SNAKE_CASE_    )    )
  
       lowercase__					:     Tuple   = []
       for block in encrypted_message.split(','    ):
            encrypted_blocks.append(int(SCREAMING_SNAKE_CASE_    )    )
  
       return decrypt_message(SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_			,  (n, d)			,  SCREAMING_SNAKE_CASE_    )
  
  def 			snake_case__    (					):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       lowercase__					:     Any   = 'encrypted_file.txt'
       lowercase__					:     Union[str, Any]   = input(R'Encrypt\Decrypt [e\d]: '    )
  
       if response.lower().startswith('e'    ):
            lowercase__					:     Any   = 'encrypt'
       elif response.lower().startswith('d'    ):
            lowercase__					:     Tuple   = 'decrypt'
  
       if mode == "encrypt":
            if not os.path.exists('rsa_pubkey.txt'    ):
                 rkg.make_key_files('rsa'			,  1_024    )
  
            lowercase__					:     str   = input('\nEnter message: '    )
            lowercase__					:     str   = 'rsa_pubkey.txt'
            print(f"""Encrypting and writing to {filename}..."""    )
            lowercase__					:     Union[str, Any]   = encrypt_and_write_to_file(SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_    )
  
            print('\nEncrypted text:'    )
            print(SCREAMING_SNAKE_CASE_    )
  
       elif mode == "decrypt":
            lowercase__					:     List[Any]   = 'rsa_privkey.txt'
            print(f"""Reading from {filename} and decrypting..."""    )
            lowercase__					:     Any   = read_from_file_and_decrypt(SCREAMING_SNAKE_CASE_			,  SCREAMING_SNAKE_CASE_    )
            print('writing decryption to rsa_decryption.txt...'    )
            with open('rsa_decryption.txt'			,  'w'    ) as dec:
                 dec.write(SCREAMING_SNAKE_CASE_    )
  
            print('\nDecryption:'    )
            print(SCREAMING_SNAKE_CASE_    )
  
  
  if __name__ == "__main__":
    main()
  
  
style_context: 
  
  from __future__ import annotations
  
  
  class    SCREAMING_SNAKE_CASE__      :
  
  
  
  
  
      def __init__(   self		,     a = 0):
           lowercase__					:     int   = value
           lowercase__					:     Node | None   = None
           lowercase__					:     Node | None   = None
  
  
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					Node | None			,  SCREAMING_SNAKE_CASE_	:					Node | None    ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       if treea is None:
            return treea
       if treea is None:
            return treea
  
       lowercase__					:     Optional[Any]   = treea.value + treea.value
       lowercase__					:     Union[str, Any]   = merge_two_binary_trees(treea.left			,  treea.left    )
       lowercase__					:     Optional[Any]   = merge_two_binary_trees(treea.right			,  treea.right    )
       return treea
  
  def 			snake_case__    (					SCREAMING_SNAKE_CASE_	:					Node | None    ):
  
  
  
       '''simple docstring'''
  
  
  
  
  
       if root:
            print(root.value    )
            print_preorder(root.left    )
            print_preorder(root.right    )
  
  
  if __name__ == "__main__":
         snake_case_    						=				Node(1)
         snake_case_    						=				Node(2)
         snake_case_    						=				Node(3)
         snake_case_    						=				Node(4)
  
         snake_case_    						=				Node(2)
         snake_case_    						=				Node(4)
         snake_case_    						=				Node(6)
         snake_case_    						=				Node(9)
         snake_case_    						=				Node(5)
  
         print('''Tree1 is: ''')
         print_preorder(treea)
         print('''Tree2 is: ''')
         print_preorder(treea)
         snake_case_    						=				merge_two_binary_trees(treea, treea)
         print('''Merged Tree is: ''')
         print_preorder(merged_tree)
  
  