判断数正负

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	ALT_sunruize	19ms	20.4 MiB	C++14	171 Bytes	2026-9-19 18:55:02
AC	ALT_wangluoqi	19ms	20.4 MiB	C++14	180 Bytes	2026-9-23 20:05:58
AC	ALT_liangxuanhe	19ms	20.4 MiB	C++14	192 Bytes	2026-10-22 19:42:10
AC	admin	20ms	20.4 MiB	C++14	281 Bytes	2026-8-29 8:54:00
AC	ALT_wujinze	20ms	20.4 MiB	C++14	190 Bytes	2026-9-29 19:48:17
AC	ALT_yangkailin	20ms	20.4 MiB	C++14	174 Bytes	2026-10-22 19:31:11
AC	ALT_jingyiqi	20ms	20.4 MiB	C++14	207 Bytes	2026-10-22 19:37:34
AC	ALT_chenghaoxuan	20ms	20.4 MiB	C++14	210 Bytes	2026-10-22 19:34:39
AC	ALT_chengao	20ms	20.4 MiB	C++14	163 Bytes	2026-9-19 19:07:41
AC	ALT_zhangzidong	21ms	20.4 MiB	C++14	210 Bytes	2026-10-1 9:56:22
AC	baiqi	22ms	20.4 MiB	C++14	196 Bytes	2026-10-22 19:24:08
AC	ALT_sunshuoran	22ms	20.4 MiB	C++14	200 Bytes	2026-9-28 21:53:37