练18.4 计算邮资

状态	递交者	时间	内存	语言	代码	递交时间
AC	wyh	23ms	760 KiB	C++98	436 Bytes	2025-7-18 9:12:39
AC	UID 59	24ms	508 KiB	C++98	475 Bytes	2025-10-26 16:28:47
AC	UID 24	25ms	512 KiB	C++20(O2)	261 Bytes	2026-7-24 16:18:49
AC	UID 299	25ms	768 KiB	C++20(O2)	447 Bytes	2026-7-24 16:16:32
AC	UID 18	27ms	504 KiB	C++98	503 Bytes	2025-10-26 16:11:52
AC	李屹则	27ms	504 KiB	C++98	318 Bytes	2025-12-5 6:53:08
AC	UID 301	27ms	512 KiB	C++20(O2)	396 Bytes	2026-8-12 8:21:03
AC	UID 298	27ms	512 KiB	C++20(O2)	429 Bytes	2026-7-24 16:32:29