【例4.1】交换两个数的位置

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	BRO	2ms	536 KiB	C++98	162 Bytes	2024-7-8 23:27:26
AC	yzh1217	2ms	768 KiB	C++14(O2)	132 Bytes	2024-8-13 16:22:58
AC	_chjich_	2ms	536 KiB	C++14	107 Bytes	2024-7-11 13:04:17
AC	shtian	3ms	536 KiB	C++98	148 Bytes	2024-7-10 20:38:08
AC	string_dbr	3ms	764 KiB	C++14(O2)	121 Bytes	2024-7-11 12:59:32