【例21.3】字符类型判断

Status	Submit By	Time	Memory	Language	Code	Submit At

AC	BC20270223	13ms	768 KiB	C++17(O2)	428 Bytes	2025-3-27 20:59:54
AC	summer23055	13ms	412 KiB	C++17(O2)	364 Bytes	2023-8-9 14:44:28
AC	summer23041	13ms	412 KiB	C++17(O2)	273 Bytes	2023-8-9 11:13:44
AC	BC20270022	13ms	536 KiB	C++17(O2)	240 Bytes	2025-3-22 16:33:32
AC	BC20260005	13ms	412 KiB	C++17(O2)	253 Bytes	2023-11-9 18:15:20
AC	summer23010	14ms	412 KiB	C++17(O2)	424 Bytes	2023-8-9 20:36:18
AC	summer23052	14ms	412 KiB	C++17(O2)	242 Bytes	2023-8-9 16:00:22
AC	CC20260074	14ms	412 KiB	C++17(O2)	273 Bytes	2023-10-29 10:53:02
AC	C20250080	169ms	3.4 MiB	Python 3	157 Bytes	2023-9-22 9:26:49
AC	C20250459	210ms	3.4 MiB	Python 3	143 Bytes	2023-11-4 20:44:16