练40.1 小写变大写

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	朱子轩	5ms	504 KiB	C++98	99 Bytes	2025-10-1 10:40:36
AC	庞少卿	6ms	504 KiB	C++98	120 Bytes	2025-11-27 14:49:08
AC	吴树恒	6ms	536 KiB	C++98	121 Bytes	2025-9-24 23:08:55
AC	张若煊	6ms	512 KiB	C++98	123 Bytes	2026-1-15 20:14:33