【例21.3】字符类型判断

状态	递交者	时间	内存	语言	代码	递交时间
AC	2班媒婆	12ms	532 KiB	C++98	266 Bytes	2025-12-21 11:31:40
AC	liuyimingxiaotaozi	12ms	504 KiB	C++14(O2)	298 Bytes	2025-12-21 11:34:22
AC	孙昊源挑战新手村	12ms	764 KiB	C++17(O2)	339 Bytes	2025-7-17 14:42:34
AC	liyuzhe	12ms	508 KiB	C++14(O2)	298 Bytes	2025-5-30 20:06:43
AC	徐政皓很帅	13ms	508 KiB	C++14(O2)	301 Bytes	2025-5-30 20:05:10
AC	王彦清	13ms	768 KiB	C++14(O2)	264 Bytes	2026-1-25 16:44:31
AC	孙鸣阳	13ms	504 KiB	C++14	335 Bytes	2025-7-18 8:34:00
AC	qq001	13ms	504 KiB	C++14(O2)	312 Bytes	2025-5-30 20:02:31
AC	whs__1234	13ms	508 KiB	C++14(O2)	274 Bytes	2025-5-30 20:10:50
AC	Jerry	13ms	512 KiB	C++14(O2)	308 Bytes	2025-12-21 11:32:54
AC	zhouyanlin	14ms	512 KiB	C++14(O2)	263 Bytes	2026-1-25 16:43:38
AC	renjunyi	14ms	508 KiB	C++98	287 Bytes	2025-5-23 19:54:01
AC	王源熙	14ms	512 KiB	C++14(O2)	323 Bytes	2026-1-25 16:46:56
AC	25haozyq	14ms	504 KiB	C++14(O2)	245 Bytes	2025-6-10 13:24:45
AC	zhl	14ms	540 KiB	C++14(O2)	302 Bytes	2026-1-17 15:05:47
AC	王麒竣	183ms	4.1 MiB	Python 3	143 Bytes	2026-1-3 17:32:57
AC	kmjb002	183ms	3.9 MiB	Python 3	144 Bytes	2026-1-3 17:34:56
AC	cindy	184ms	3.8 MiB	Python 3	146 Bytes	2026-4-4 16:55:55
AC	徐润余	185ms	3.9 MiB	Python 3	155 Bytes	2026-1-3 17:27:41
AC	justin	192ms	3.9 MiB	Python 3	146 Bytes	2026-1-3 17:42:13