【例70.2】求A-B字符串

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	xxw6	33ms	764 KiB	C++98	284 Bytes	2025-3-2 16:37:31
AC	闵俊皓	33ms	764 KiB	C++98	355 Bytes	2024-9-25 22:13:22
AC	2025_3	34ms	504 KiB	C++98	284 Bytes	2025-4-15 20:11:01
AC	江宜轩	34ms	768 KiB	C++98	277 Bytes	2024-11-23 11:31:02
AC	Chaser Of Light	61ms	732 KiB	C++98	346 Bytes	2024-6-5 13:45:07