练40.1 小写变大写

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	stevexiong	21ms	544 KiB	C++98	139 Bytes	2025-10-3 9:06:42
AC	freyazhou	23ms	556 KiB	C++98	125 Bytes	2025-9-23 20:08:42
AC	xianyinli	23ms	540 KiB	C++20(O2)	124 Bytes	2025-9-20 11:20:35
AC	rebeccaren	24ms	548 KiB	C++20(O2)	141 Bytes	2025-9-21 20:33:18
AC	hankli	25ms	552 KiB	C++20	100 Bytes	2025-10-20 17:12:39
AC	carlosdeng	25ms	552 KiB	C++20(O2)	180 Bytes	2025-10-18 8:48:19
AC	dennisxu	27ms	548 KiB	C++20	185 Bytes	2025-10-17 12:09:52
AC	peterwei	28ms	552 KiB	C++20(O2)	127 Bytes	2025-12-23 21:02:17
AC	tymonli	254ms	4 MiB	Python 3	34 Bytes	2025-9-20 11:21:59