计算(a+b)*c的值

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	shezeyi	22ms	744 KiB	C++14(O2)	140 Bytes	2026-2-3 14:49:58
AC	lizongxian	22ms	520 KiB	C++14(O2)	310 Bytes	2026-2-3 14:51:22
AC	ninghuaizhou	22ms	668 KiB	C++14(O2)	303 Bytes	2026-2-3 15:37:33
AC	zhangxiyang	23ms	540 KiB	C++14(O2)	310 Bytes	2026-2-3 14:50:49
AC	gaohaoran	24ms	520 KiB	C++14(O2)	303 Bytes	2026-2-3 15:29:36