练20.3 开灯关灯

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	nianyanimen	3ms	504 KiB	C++98	88 Bytes	2025-5-2 16:24:42
AC	pengtaifu	3ms	320 KiB	C++98	110 Bytes	2024-8-10 20:01:47
AC	lihaorui	3ms	536 KiB	C++98	141 Bytes	2025-1-22 15:17:28
AC	zhuyinuo	3ms	536 KiB	C++98	138 Bytes	2025-1-21 16:59:07
AC	jihaoyuan	3ms	536 KiB	C++98	91 Bytes	2025-1-23 8:56:40