练20.3 开灯关灯

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	ysqeva	3ms	504 KiB	C++14(O2)	91 Bytes	2025-12-27 10:59:29
AC	PomeloGPT	3ms	508 KiB	C++14(O2)	175 Bytes	2025-12-1 16:48:59
AC	YS白龙	3ms	536 KiB	C++14(O2)	144 Bytes	2024-3-9 19:20:21
AC	周子轶	3ms	504 KiB	C++14(O2)	92 Bytes	2025-11-16 11:17:44