【例4.1】交换两个数的位置

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	zp25wxc	2ms	504 KiB	C++17(O2)	188 Bytes	2025-12-7 10:29:24
AC	hantina	3ms	504 KiB	C++17(O2)	180 Bytes	2025-12-10 19:13:26
AC	zp25gyx	3ms	504 KiB	C++17(O2)	232 Bytes	2025-12-7 10:35:13
AC	zp25tyn	3ms	512 KiB	C++17(O2)	155 Bytes	2026-1-24 18:49:17