判断是否为两位数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	adler	15ms	376 KiB	C++14	198 Bytes	2024-3-27 22:19:12
AC	haiyang	16ms	376 KiB	C++14	173 Bytes	2024-5-29 19:07:00
AC	袁华梓	18ms	376 KiB	C++14	171 Bytes	2024-10-31 19:05:38
AC	易航	18ms	376 KiB	C++14	159 Bytes	2024-11-16 20:44:23
AC	余尚儒	18ms	380 KiB	C++14	155 Bytes	2024-11-16 20:42:01
AC	昊昊	18ms	424 KiB	C++14	177 Bytes	2024-11-16 20:38:46
AC	cherry	19ms	556 KiB	C++14	182 Bytes	2024-11-3 13:30:40
AC	王若兰	19ms	404 KiB	C++14	205 Bytes	2024-10-31 19:05:15
AC	杜蓉蓉	19ms	424 KiB	C++14	163 Bytes	2024-10-31 19:02:44
AC	xinao	19ms	416 KiB	C++14	158 Bytes	2023-10-22 13:42:23
AC	宇轩	19ms	376 KiB	C++14	181 Bytes	2024-11-16 20:43:24
AC	yuchen	20ms	404 KiB	C++17	284 Bytes	2023-10-20 19:44:02