判断是否存在重复的数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	zhuliucheng	10ms	6.1 MiB	C++17	182 Bytes	2025-6-6 17:35:19
AC	huhaoyu	10ms	6.3 MiB	C++17	189 Bytes	2025-4-19 16:12:42
AC	huxinran	10ms	6.1 MiB	C++17	181 Bytes	2025-6-6 17:38:34
AC	wangmuhan	10ms	6 MiB	C++17	181 Bytes	2025-4-23 21:42:11
AC	wangsichen	10ms	6 MiB	C++17	263 Bytes	2025-4-25 20:09:46
AC	wanghaoyu	11ms	6.3 MiB	C++17	197 Bytes	2025-4-18 21:01:34
AC	wanghe	11ms	6.1 MiB	C++17	182 Bytes	2025-6-6 17:23:50
AC	dingyuchen	11ms	6.3 MiB	C++17	179 Bytes	2025-4-18 21:04:27
AC	qiyunfei	11ms	6 MiB	C++17	188 Bytes	2025-5-4 23:29:46
AC	xuyicheng	11ms	6.2 MiB	C++17	183 Bytes	2025-7-8 21:03:33
AC	panghaoran	11ms	6.3 MiB	C++17	179 Bytes	2025-4-18 20:49:37
AC	zhangrui	11ms	6.1 MiB	C++17	186 Bytes	2025-6-5 21:18:27
AC	xuxiao	11ms	6 MiB	C++17	208 Bytes	2025-4-20 18:15:13
AC	yanghaoran	11ms	6.2 MiB	C++17	263 Bytes	2026-1-17 9:41:48
AC	yezhijie	11ms	6.2 MiB	C++17	222 Bytes	2026-2-6 7:10:07
AC	yezhenghe	11ms	6.2 MiB	C++17	220 Bytes	2026-2-5 15:55:40
AC	lipeilin	11ms	6.2 MiB	C++17	179 Bytes	2025-4-12 20:08:06
AC	yanyan	11ms	6.3 MiB	C++17	178 Bytes	2026-2-12 16:56:35
AC	huhaojia	11ms	6 MiB	C++17	138 Bytes	2025-5-17 13:49:50
AC	wuxinchen	12ms	6.1 MiB	C++17	190 Bytes	2025-11-1 15:33:18
AC	duanhaoxuan	12ms	6.1 MiB	C++17	178 Bytes	2025-6-8 17:25:05
AC	lixianan	12ms	6 MiB	C++17	181 Bytes	2025-5-13 20:57:01
AC	xutianyu	12ms	6.3 MiB	C++17	362 Bytes	2026-2-25 16:54:33
AC	liantong	12ms	6.1 MiB	C++17	189 Bytes	2025-6-1 10:08:52
AC	zhangbochao	12ms	6.3 MiB	C++17	220 Bytes	2026-2-6 17:29:07
AC	lixuxian	13ms	6.2 MiB	C++17	236 Bytes	2025-10-12 9:16:10
AC	limengcheng	13ms	6.1 MiB	C++17	186 Bytes	2025-11-27 17:20:20
AC	xuyi	17ms	6.3 MiB	C++17	309 Bytes	2025-4-18 21:17:22