练18.4 计算邮资

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	张若煊	26ms	764 KiB	C++98	197 Bytes	2025-9-22 19:22:50
AC	KS_QiChai	26ms	760 KiB	C++98	587 Bytes	2025-11-26 21:53:04
AC	劳钰峰	27ms	508 KiB	C++98	555 Bytes	2025-10-15 21:27:55
AC	朱梓霖	29ms	768 KiB	C++98	241 Bytes	2025-9-25 18:10:42
AC	庞少卿	29ms	508 KiB	C++98	244 Bytes	2025-10-16 14:34:25
AC	朱子轩	30ms	764 KiB	C++14(O2)	278 Bytes	2025-9-13 18:26:32