练20.2 判断是否为两位数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	朱子轩	26ms	768 KiB	C++14(O2)	138 Bytes	2025-9-14 14:24:15
AC	劳钰峰	27ms	528 KiB	C++98	182 Bytes	2025-10-1 12:00:14
AC	庞少卿	27ms	508 KiB	C++98	124 Bytes	2025-10-20 20:07:52
AC	陈沛宜	27ms	508 KiB	C++98	158 Bytes	2025-12-3 11:37:54
AC	陈天翊	27ms	508 KiB	C++98	145 Bytes	2025-11-20 21:38:20
AC	朱梓霖	28ms	788 KiB	C++98	142 Bytes	2025-10-1 10:32:22
AC	冼子童	28ms	508 KiB	C++98	142 Bytes	2025-11-26 11:54:57
AC	张若煊	33ms	764 KiB	C++98	146 Bytes	2025-9-23 21:34:43