判断是否为两位数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	C23huangchengfu	37ms	808 KiB	C++11(O2)	553 Bytes	2024-8-5 20:59:32
AC	C24zhuchengyu	40ms	772 KiB	C++11(O2)	128 Bytes	2024-8-20 16:17:39
AC	C24chenxinhao	40ms	792 KiB	C++11(O2)	141 Bytes	2024-7-15 20:47:51
AC	C23liukaiyan	41ms	808 KiB	C++11(O2)	132 Bytes	2024-7-16 20:50:03
AC	C23lingyiyu	43ms	880 KiB	C++11(O2)	119 Bytes	2024-7-20 20:55:58
AC	C24zhangzheyuan	46ms	808 KiB	C++11(O2)	177 Bytes	2024-7-19 20:23:31