【例40.1】字符类型判断

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	carlosdeng	22ms	544 KiB	C++20(O2)	215 Bytes	2025-9-20 11:12:33
AC	samuelgao	22ms	536 KiB	C++20	235 Bytes	2025-9-20 11:06:27
AC	rebeccaren	22ms	576 KiB	C++20(O2)	237 Bytes	2025-9-20 11:20:53
AC	simonwu	23ms	532 KiB	C++20(O2)	233 Bytes	2025-9-20 11:09:20
AC	xianyinli	23ms	548 KiB	C++20(O2)	229 Bytes	2025-9-20 11:01:00
AC	ericyu	24ms	544 KiB	C++98	213 Bytes	2025-9-20 11:14:35
AC	hankli	26ms	552 KiB	C++20	227 Bytes	2025-10-20 17:27:54
AC	tymonli	249ms	4 MiB	Python 3	171 Bytes	2025-9-20 11:10:26