简单算术表达式求值

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	_chjich_	20ms	808 KiB	C++14(O2)	395 Bytes	2025-7-14 7:58:18
AC	Harry	20ms	856 KiB	C++14	313 Bytes	2026-1-8 16:46:16
AC	陈国瑞	20ms	684 KiB	C++14(O2)	301 Bytes	2025-7-15 18:25:25
AC	xzh13579	20ms	808 KiB	C++14(O2)	1.7 KiB	2025-9-5 23:34:56
AC	王思懿	20ms	852 KiB	C++17(O2)	296 Bytes	2026-2-14 9:34:53