判断是否为两位数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	BC20260031	31ms	728 KiB	C++14(O2)	269 Bytes	2023-12-12 15:37:35
AC	BC20260311	31ms	796 KiB	C++17	178 Bytes	2023-12-19 16:36:52
AC	BC20260091	31ms	760 KiB	C++17(O2)	153 Bytes	2023-12-14 21:43:32
AC	BC20260349	31ms	804 KiB	C++17(O2)	148 Bytes	2023-12-15 16:28:20
AC	CC20260060	31ms	808 KiB	C++11	153 Bytes	2023-11-12 8:20:21
AC	summer23041	33ms	756 KiB	C++17	154 Bytes	2023-10-5 16:31:19
AC	CC20260191	38ms	804 KiB	C++17(O2)	117 Bytes	2024-10-7 10:29:23
AC	BC20260030	40ms	804 KiB	C++17(O2)	151 Bytes	2024-4-13 11:36:31
AC	BC20260080	40ms	808 KiB	C++17(O2)	264 Bytes	2024-4-4 23:31:01
AC	C20250070	41ms	804 KiB	C++17(O2)	180 Bytes	2024-5-18 11:41:23
AC	BC20260085	41ms	840 KiB	C++11	264 Bytes	2024-4-8 12:06:56
AC	summer23061	44ms	804 KiB	C++98(O2)	145 Bytes	2024-6-14 16:48:00
AC	BC20260231	44ms	804 KiB	C++11(O2)	137 Bytes	2024-3-22 16:36:42