练20.2 判断是否为两位数

状态	递交者	时间	内存	语言	代码	递交时间
AC	wyh	24ms	760 KiB	C++98	152 Bytes	2025-7-15 11:44:19
AC	于小航	27ms	512 KiB	C++98	172 Bytes	2026-5-5 15:14:34
AC	UID 298	27ms	516 KiB	C++20(O2)	157 Bytes	2026-7-23 17:03:49
AC	UID 24	27ms	516 KiB	C++20(O2)	164 Bytes	2026-7-23 16:38:33
AC	李屹则	27ms	508 KiB	C++98	190 Bytes	2025-12-5 12:51:30
AC	许铖晟	27ms	760 KiB	C++98	558 Bytes	2025-7-16 9:24:35
AC	UID 299	28ms	556 KiB	C++20(O2)	150 Bytes	2026-7-23 16:30:12