【二分1】查询是否存在某个数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	执着的星光3818	5563ms	22 MiB	Python	577 Bytes	2026-10-5 16:49:48
AC	追风的考拉4932	5585ms	22 MiB	Python 3	439 Bytes	2026-10-14 17:50:42
AC	小川彩	5622ms	22 MiB	Python 3	445 Bytes	2026-8-25 19:46:19
AC	xx	5634ms	21.9 MiB	Python 3	390 Bytes	2026-9-2 20:59:55
AC	甜美的银杏	5666ms	21.9 MiB	Python 3	423 Bytes	2026-9-1 16:25:15
AC	踏实的浪花6158	5674ms	26.4 MiB	Python 3	444 Bytes	2026-10-14 23:04:46
AC	狄拉克之海的涟漪	5687ms	22.1 MiB	Python 3	418 Bytes	2026-8-17 0:16:27
AC	v0uEkomn3d	5711ms	21.9 MiB	Python 3	405 Bytes	2026-9-2 13:49:44
AC	爱笑的毛毛虫	5747ms	22.2 MiB	Python 3	583 Bytes	2026-8-13 15:32:34
AC	潇洒的浣熊8935	5761ms	22 MiB	Python 3	495 Bytes	2026-10-7 15:18:27
AC	睿智的狐狸	5778ms	21.9 MiB	Python	968 Bytes	2026-8-31 15:05:51
AC	慢吞吞的山茶1855	5817ms	22.1 MiB	Python 3	683 Bytes	2026-9-16 15:36:31
AC	痒痒的	6091ms	21.9 MiB	Python	411 Bytes	2026-8-31 21:08:49
AC	MAN！	6212ms	199.3 MiB	PyPy3	711 Bytes	2025-6-16 2:02:08
AC	oqiHmUKYyz	6222ms	22 MiB	Python	394 Bytes	2026-7-27 15:58:23
AC	正直的布偶	7840ms	157.5 MiB	Java	1 KiB	2026-10-4 10:39:20