练20.3 开灯关灯

状态	递交者	时间	内存	语言	代码	递交时间
AC	wyh	2ms	504 KiB	C++98	87 Bytes	2025-7-16 10:24:11
AC	UID 299	3ms	512 KiB	C++20(O2)	131 Bytes	2026-7-23 16:32:25
AC	李屹则	3ms	504 KiB	C++98	187 Bytes	2025-12-5 12:52:22
AC	许铖晟	3ms	508 KiB	C++98	129 Bytes	2025-7-16 9:30:36
AC	于小航	3ms	540 KiB	C++98	88 Bytes	2026-5-5 15:15:45
AC	UID 298	3ms	512 KiB	C++20(O2)	137 Bytes	2026-7-23 17:02:20
AC	UID 24	3ms	568 KiB	C++20(O2)	164 Bytes	2026-7-23 16:40:26