练30.2 错误减法

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	张若煊	53ms	504 KiB	C++98	191 Bytes	2025-10-12 20:27:45
AC	庞少卿	55ms	504 KiB	C++98	245 Bytes	2025-10-28 18:11:57
AC	朱梓霖	58ms	532 KiB	C++98	184 Bytes	2025-11-24 15:14:06
AC	朱子轩	59ms	764 KiB	C++98	164 Bytes	2025-9-21 13:44:32