大小写转换

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	haiyang	5ms	400 KiB	C++14	233 Bytes	2024-5-29 19:52:03
AC	余尚儒	5ms	380 KiB	C++14	177 Bytes	2024-11-9 19:41:03
AC	adler	5ms	376 KiB	C++14	393 Bytes	2024-5-24 11:50:33
AC	yuchen	5ms	400 KiB	C++17	221 Bytes	2024-5-30 19:14:07
AC	昊昊	5ms	376 KiB	C++14	181 Bytes	2024-11-9 19:28:56
AC	杜蓉蓉	5ms	376 KiB	C++14	184 Bytes	2024-10-17 20:19:39
AC	易航	6ms	412 KiB	C++14	182 Bytes	2024-11-9 19:38:38
AC	王若兰	6ms	432 KiB	C++14	195 Bytes	2024-10-31 17:48:10
AC	袁华梓	6ms	412 KiB	C++14	193 Bytes	2024-10-17 20:19:01
AC	cherry	7ms	380 KiB	C++14	178 Bytes	2024-10-17 20:20:51
AC	宇轩	7ms	404 KiB	C++14	159 Bytes	2024-11-9 19:29:24