【二分1】查询是否存在某个数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	CodeFunde84cce601	2596ms	15 MiB	Python 3	689 Bytes	2025-10-2 23:02:55
AC	CodeFunde2b9aabd3	2615ms	14.9 MiB	Python 3	969 Bytes	2025-9-25 8:16:48
AC	CodeFun45ec69736e	2643ms	15 MiB	Python 3	441 Bytes	2025-9-29 12:09:52
AC	CodeFun10c5dd749d	2697ms	15.1 MiB	Python 3	433 Bytes	2025-9-29 18:06:43
AC	CodeFuneb863ca010	2721ms	15.2 MiB	Python 3	398 Bytes	2025-10-4 13:26:28
AC	CodeFunde699c65b1	2765ms	15.1 MiB	Python 3	412 Bytes	2025-8-12 11:07:33
AC	CodeFun564513207f	2802ms	15 MiB	Python 3	371 Bytes	2025-10-20 22:37:41
AC	CodeFun2c494d109c	2906ms	15.2 MiB	Python 3	411 Bytes	2025-10-28 22:17:55
AC	CodeFun935915a086	2974ms	15 MiB	Python 3	540 Bytes	2025-9-23 17:17:37
AC	CodeFund7c218195d	2985ms	14.9 MiB	Python 3	461 Bytes	2025-10-9 14:18:08
AC	CodeFund21f0146e8	3139ms	14.6 MiB	Python 3	498 Bytes	2024-12-26 21:44:02
AC	CodeFun56b16a1316	3152ms	14.9 MiB	Python 3	545 Bytes	2024-12-18 15:24:24
AC	kingchalice	3339ms	14.7 MiB	Python 3	342 Bytes	2025-1-12 16:35:18
AC	CodeFun25cbc25fbb	3356ms	15.1 MiB	Python 3	620 Bytes	2025-10-5 23:32:31
AC	CodeFun24592ec125	3393ms	78.3 MiB	PyPy3	206 Bytes	2025-7-15 21:31:59
AC	jnly3813	3447ms	14.8 MiB	Python 3	466 Bytes	2025-2-20 20:48:33
AC	CodeFun629a1f1467	3492ms	14.7 MiB	Python 2	474 Bytes	2025-3-14 23:22:10
AC	CodeFun32c391ac89	4563ms	77.6 MiB	PyPy3	480 Bytes	2025-10-19 18:57:38
AC	CodeFunc893ad4de1	5213ms	199.1 MiB	PyPy3	601 Bytes	2025-8-31 2:34:17
AC	MAN！	6212ms	199.3 MiB	PyPy3	711 Bytes	2025-6-16 2:02:08
AC	TaZi	7951ms	102.5 MiB	Java	1.3 KiB	2024-12-18 22:10:22