判断是否为两位数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	_chjich_	33ms	728 KiB	C++14(O2)	175 Bytes	2025-7-11 9:37:19
AC	曾彦彬contest	34ms	772 KiB	C++14(O2)	152 Bytes	2025-7-7 20:11:33
AC	maochengjun	34ms	736 KiB	C++14	176 Bytes	2025-7-9 11:48:22
AC	白力予	35ms	804 KiB	C++14(O2)	173 Bytes	2025-8-7 20:24:03
AC	xzh13579	36ms	816 KiB	C++14(O2)	212 Bytes	2025-7-27 18:07:01
AC	若白	37ms	852 KiB	C++17(O2)	181 Bytes	2025-7-11 15:30:36
AC	陈国瑞	38ms	808 KiB	C++14(O2)	125 Bytes	2025-7-15 17:20:22
AC	龙肖瑾xly2025	40ms	808 KiB	C++14(O2)	161 Bytes	2025-7-28 14:53:08
AC	女乃龙	40ms	744 KiB	C++14(O2)	176 Bytes	2025-7-11 14:54:04