【例16.1】判断数正负

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	徐靖程 (lfyst2025030)	25ms	756 KiB	C++14(O2)	169 Bytes	2025-5-30 17:56:22
AC	王钰凯 (lfyst2025022)	25ms	508 KiB	C++14(O2)	163 Bytes	2025-4-16 17:33:02
AC	王浩泽 (zdqz202577)	26ms	508 KiB	C++14(O2)	170 Bytes	2025-12-16 16:49:39
AC	lfy48	26ms	504 KiB	C++14(O2)	262 Bytes	2025-4-9 20:31:04
AC	杜懿轩 (zdqz202575)	27ms	760 KiB	C++14(O2)	170 Bytes	2025-12-15 16:56:36
AC	刘思远 (lfyst2025012)	27ms	760 KiB	C++14(O2)	188 Bytes	2025-4-16 18:12:00