字符串大小写转换

状态	递交者	时间	内存	语言	代码	递交时间
AC	陈子轩	5ms	1 KiB	G++(9.3(with c++17))	245 Bytes	2025-1-17 9:16:41
AC	longhongan	5ms	1 KiB	G++(9.3(with c++17))	290 Bytes	2025-1-17 10:00:46
AC	xiezixuan	5ms	1 KiB	G++(9.3(with c++17))	232 Bytes	2025-1-17 18:47:19
AC	王梓任	5ms	1 KiB	G++(9.3(with c++17))	265 Bytes	2025-1-17 10:07:33
AC	刘鸣谦	5ms	1 KiB	G++(9.3(with c++17))	359 Bytes	2025-1-17 8:44:09
AC	zqr	5ms	1 KiB	G++(9.3(with c++17))	290 Bytes	2025-1-19 10:27:19