[ABC214B] 有多少个？（How many?）

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	许皓辰	28ms	576 KiB	C++14(O2)	293 Bytes	2025-10-19 15:09:34
AC	王婧涵	28ms	6.2 MiB	C++14(O2)	263 Bytes	2025-9-24 18:07:58
AC	邱怡辰	28ms	6.2 MiB	C++14(O2)	383 Bytes	2025-9-14 10:45:47
AC	方一帆	28ms	6.2 MiB	C++14(O2)	307 Bytes	2025-9-14 11:10:59
AC	厉继业	29ms	6.2 MiB	C++14(O2)	237 Bytes	2025-9-20 9:48:48
AC	吕明哲	30ms	6.2 MiB	C++14(O2)	332 Bytes	2025-9-27 19:08:36
AC	王子墨	31ms	6.3 MiB	C++14(O2)	449 Bytes	2025-10-8 13:51:57
AC	陈奕可	31ms	6.2 MiB	C++14(O2)	275 Bytes	2025-9-20 15:13:42
AC	王嘉怡	33ms	6.2 MiB	C++14(O2)	243 Bytes	2025-9-13 15:55:09
AC	余昕璇	34ms	548 KiB	C++14(O2)	258 Bytes	2025-10-15 20:02:03
AC	jike1994	38ms	6.2 MiB	C++14(O2)	289 Bytes	2025-9-12 14:17:26