输出字符串中大写字母

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	xyls	4ms	9 MiB	C++98	196 Bytes	2025-2-13 22:59:29
AC	huangshengfeng	4ms	9.1 MiB	C++98	202 Bytes	2025-12-19 19:23:49
AC	baoyufu	5ms	9.1 MiB	C++98	219 Bytes	2025-12-19 19:25:49
AC	liuhaoqi	6ms	9 MiB	C++98	221 Bytes	2025-2-22 9:05:59