【例23.2】这个月有几天

状态	递交者	时间	内存	语言	代码	递交时间
AC	13951145877	27ms	504 KiB	C++17(O2)	384 Bytes	2025-7-17 11:30:57
AC	18082060086	28ms	768 KiB	C++17(O2)	433 Bytes	2025-7-2 11:53:44
AC	15896015968	29ms	512 KiB	C++17(O2)	482 Bytes	2025-7-5 17:32:45
AC	13901420420	29ms	760 KiB	C++17(O2)	423 Bytes	2025-7-2 11:56:01
AC	15052321516	31ms	508 KiB	C++17(O2)	465 Bytes	2025-7-2 16:06:37
AC	15996006306	31ms	508 KiB	C++17(O2)	476 Bytes	2025-7-5 17:42:35
AC	15861021069	31ms	508 KiB	C++17(O2)	353 Bytes	2025-6-30 16:30:14
AC	15052385956	31ms	760 KiB	C++17(O2)	430 Bytes	2025-7-2 11:57:36
AC	13641567801	31ms	760 KiB	C++17(O2)	465 Bytes	2025-7-2 12:03:34
AC	15952606862	32ms	760 KiB	C++17(O2)	462 Bytes	2025-7-2 19:26:27
AC	15152959063	32ms	508 KiB	C++17(O2)	421 Bytes	2025-7-2 11:53:49
AC	15252666790	33ms	504 KiB	C++17(O2)	428 Bytes	2025-7-2 11:38:38
AC	caochungui	33ms	760 KiB	C++17(O2)	539 Bytes	2025-7-2 11:46:51
AC	17712578847	34ms	504 KiB	C++17(O2)	355 Bytes	2025-7-5 17:34:26