练20.2 判断是否为两位数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	小赵老师	24ms	532 KiB	C++14	177 Bytes	2025-11-23 11:48:23
AC	李昀柯	26ms	768 KiB	C++14	151 Bytes	2026-4-13 17:56:13
AC	龙傲天	26ms	768 KiB	C++14	151 Bytes	2026-4-13 17:56:30
AC	金士涵	27ms	516 KiB	C++14	149 Bytes	2026-4-13 17:56:20
AC	梦泽	27ms	512 KiB	C++14	169 Bytes	2026-4-13 18:03:50
AC	马梓睿	27ms	508 KiB	C++14	145 Bytes	2025-11-23 11:54:58
AC	王宇泽	28ms	760 KiB	C++14	147 Bytes	2025-11-23 11:52:22