【二分1】查询是否存在某个数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	CodeFunc4b98ffac1	868ms	7 MiB	C++98	672 Bytes	2025-5-14 15:13:52
AC	CodeFun605c0b58dd	869ms	7.2 MiB	C++98	784 Bytes	2025-5-6 16:24:21
AC	CodeFun59f348eee8	881ms	7 MiB	C++98	637 Bytes	2025-5-19 15:12:47
AC	CodeFun3ee1eb3bcb	882ms	7 MiB	C++11	659 Bytes	2025-5-13 1:25:57
AC	CodeFun1fe18eae9e	886ms	7.3 MiB	C++17	748 Bytes	2025-9-9 22:08:03
AC	CodeFunb04d2873e7	886ms	7.2 MiB	C++98	727 Bytes	2025-4-4 14:39:30
AC	CodeFun62b3b30ae4	887ms	7 MiB	C++11	674 Bytes	2025-7-28 20:30:07
AC	CodeFun186014ff3e	892ms	7 MiB	C++11	1.5 KiB	2025-5-2 23:10:02
AC	CodeFund4f37ad8c7	899ms	7 MiB	C++11	723 Bytes	2025-8-21 9:00:36
AC	CodeFune757b3cb9b	905ms	7.1 MiB	C++11	686 Bytes	2025-7-9 21:32:41
AC	CodeFun8ac36099ac	914ms	7 MiB	C++14	667 Bytes	2025-7-27 20:28:32
AC	比例前任	926ms	6.9 MiB	C++11	916 Bytes	2025-5-10 13:43:49
AC	CodeFun18e239aa67	954ms	6.9 MiB	C++17(O2)	765 Bytes	2025-9-28 12:46:21
AC	CodeFunaf28fd5fbc	993ms	6.8 MiB	C++17(O2)	717 Bytes	2025-10-8 16:40:19
AC	CodeFunb10eb0db9e	1071ms	7.1 MiB	C++11	953 Bytes	2025-8-29 10:28:26
AC	CodeFun57fb1ccaea	1161ms	7 MiB	C++17(O2)	979 Bytes	2025-10-24 23:43:46
AC	CodeFun7efe9b04f7	1379ms	7.1 MiB	C++98	775 Bytes	2025-9-5 9:20:03
AC	CodeFun5615a42695	1381ms	7 MiB	C++98	927 Bytes	2025-7-16 22:49:39
AC	CodeFunffd0061b36	1881ms	6.7 MiB	C++11	492 Bytes	2025-3-18 22:37:55
AC	WendellY	2359ms	6.6 MiB	C++98	871 Bytes	2025-3-14 6:41:52
AC	CodeFun715b702dcd	2676ms	6.5 MiB	C++17	788 Bytes	2025-2-27 23:43:11