【例23.2】这个月有几天

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	SamuelXuch	26ms	412 KiB	C++17(O2)	196 Bytes	2023-10-16 15:01:03
AC	summer23031	26ms	412 KiB	C++17(O2)	916 Bytes	2023-8-11 15:50:20
AC	summer23055	26ms	412 KiB	C++17(O2)	597 Bytes	2023-8-9 16:36:15
AC	BC20260005	27ms	412 KiB	C++17(O2)	282 Bytes	2023-11-9 22:39:48
AC	SamuelXuch	27ms	412 KiB	C++17(O2)	487 Bytes	2023-10-16 14:59:30
AC	summer23047	27ms	412 KiB	C++17(O2)	279 Bytes	2023-8-9 11:00:27
AC	SamuelXuch	28ms	412 KiB	C++17(O2)	196 Bytes	2023-10-17 15:53:39
AC	SamuelXuch	28ms	412 KiB	C++17(O2)	237 Bytes	2023-10-17 15:52:03
AC	BC20260063	28ms	412 KiB	C++17(O2)	391 Bytes	2023-11-6 23:12:30
AC	SamuelXuch	28ms	412 KiB	C++17(O2)	476 Bytes	2023-10-17 15:50:07
AC	summer23041	28ms	412 KiB	C++17(O2)	372 Bytes	2023-8-11 10:42:00
AC	CC20260074	29ms	412 KiB	C++17(O2)	372 Bytes	2023-10-29 10:56:44
AC	C20250459	343ms	3.4 MiB	Python 3	417 Bytes	2023-11-5 11:40:04