Сагура Николай, 392, сев. филиал Fat12 8989			Dimitry Fat12 10626
f	1	import sys	f	1	import sys
	2			2
	3	def main():		3	def main():
n	4	data = sys.stdin.buffer.read()	n	4	file_data = sys.stdin.buffer.read()
	5	boot = data[:512]		5	boot_sector = file_data[:512]
	6	bytes_per_sector = int.from_bytes(boot[11:13], 'little')		6	sector_size = int.from_bytes(boot_sector[11:13], 'little')
	7	sectors_per_cluster = boot[13]		7	cluster_size_sectors = boot_sector[13]
	8	reserved_sectors = int.from_bytes(boot[14:16], 'little')		8	reserved_sectors_count = int.from_bytes(boot_sector[14:16], 'little'
				>	)
	9	num_fats = boot[16]		9	fat_count = boot_sector[16]
	10	max_root_entries = int.from_bytes(boot[17:19], 'little')		10	root_entries_max = int.from_bytes(boot_sector[17:19], 'little')
	11	sectors_per_fat = int.from_bytes(boot[22:24], 'little')		11	fat_sectors = int.from_bytes(boot_sector[22:24], 'little')
	12	root_dir_sector = reserved_sectors + num_fats * sectors_per_fat		12	root_start_sector = reserved_sectors_count + fat_count * fat_sectors
	13	root_dir_size_bytes = max_root_entries * 32		13	root_size_bytes = root_entries_max * 32
	14	root_dir_sectors = (root_dir_size_bytes + bytes_per_sector - 1) // b		14	root_sectors_needed = (root_size_bytes + sector_size - 1) // sector_
	>	ytes_per_sector		>	size
	15	root_dir_offset = root_dir_sector * bytes_per_sector		15	root_data_start = root_start_sector * sector_size
	16	root_dir = data[root_dir_offset:root_dir_offset + root_dir_sectors *		16	root_data = file_data[root_data_start:root_data_start + root_sectors
	>	bytes_per_sector]		>	_needed * sector_size]
	17	entries = []		17	items = []
	18	for off in range(0, root_dir_size_bytes, 32):		18	for position in range(0, root_size_bytes, 32):
	19	entry = root_dir[off:off + 32]		19	record = root_data[position:position + 32]
	20	if len(entry) < 32:		20	if len(record) < 32:
	21	break		21	break
n	22	first_byte = entry[0]	n	22	first_char = record[0]
	23	if first_byte == 0:		23	if first_char == 0:
	24	break		24	break
n	25	if first_byte == 229:	n	25	if first_char == 229:
	26	continue		26	continue
n	27	attr = entry[11]	n	27	attributes = record[11]
	28	if attr == 15:		28	if attributes == 15:
	29	continue		29	continue
n	30	if attr & 8:	n	30	if attributes & 8:
	31	continue		31	continue
n	32	name_raw = entry[0:8]	n	32	name_part = record[0:8]
	33	ext_raw = entry[8:11]		33	extension_part = record[8:11]
	34	name = name_raw.decode('cp866', errors='replace').rstrip()
	35	ext = ext_raw.decode('cp866', errors='replace').rstrip()		34	name_text = name_part.decode('cp866', errors='replace').rstrip()
				35	extension_text = extension_part.decode('cp866', errors='replace'
				>	).rstrip()
	36	if not name:		36	if not name_text:
	37	continue		37	continue
n	38	if attr & 16:	n	38	if attributes & 16:
	39	if name.startswith('.'):		39	if name_text.startswith('.'):
	40	continue		40	continue
n	41	size_repr = 'dir'	n	41	item_size = 'dir'
	42	else:		42	else:
t	43	size = int.from_bytes(entry[28:32], 'little')	t	43	file_size = int.from_bytes(record[28:32], 'little')
	44	size_repr = str(size)		44	item_size = str(file_size)
	45	full_name = name		45	complete_name = name_text
	46	if ext:		46	if extension_text:
	47	full_name = f'{name}.{ext}'		47	complete_name = f'{name_text}.{extension_text}'
	48	entries.append((full_name, size_repr))		48	items.append((complete_name, item_size))
	49	entries.sort(key=lambda x: x[0])		49	items.sort(key=lambda item: item[0])
	50	for fname, sz in entries:		50	for filename, size_info in items:
	51	print(f'{fname:<12} {sz}')		51	print(f'{filename:<12} {size_info}')
	52	if __name__ == '__main__':		52	if __name__ == '__main__':
	53	main()		53	main()

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