练40.1 小写变大写

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	chenzihao	5ms	536 KiB	C++11	118 Bytes	2024-7-31 14:01:17
AC	zhuxuanyu	6ms	324 KiB	C++11	113 Bytes	2024-7-30 21:55:11
AC	ludaichen	6ms	768 KiB	C++11	117 Bytes	2024-7-30 18:00:39
AC	chenwangzixuan	6ms	552 KiB	C++11	121 Bytes	2024-8-3 16:42:15
AC	maochenyi	6ms	540 KiB	C++11	253 Bytes	2024-7-28 14:32:13
AC	liujinghang	6ms	536 KiB	C++11	138 Bytes	2024-8-19 13:34:49