Problem D
Blackboard Numbers — Problem Statistics

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Submissions	218
Accepted submissions	69
Submission ratio	31.65%
Authors	66
Full solves [?]	66
Full solve Ratio	100.00%

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	C++	2025-11-29 08:34:58
2	Yuqi He	0.02 s	C++	2025-12-06 05:40:16
3	Ran Chen	0.02 s	C++	2025-12-06 07:46:06
4	Tristan Rocha	0.03 s	C++	2025-12-04 09:08:06
5	Bharat Saiju	0.03 s	C++	2025-12-05 10:20:04
6	Xin Ping Xandra Wong	0.03 s	C++	2025-12-06 07:05:00
7	Kenisha Vaswani	0.04 s	C++	2025-12-02 05:51:45
8	Akul Singh	0.04 s	C++	2025-12-02 07:33:25
9	Olivia Chen	0.04 s	C++	2025-12-03 03:16:35
10	Andrew Zhang	0.04 s	C++	2025-12-03 04:13:17

#	User	Runtime	Language	Date
1	Yichen Dai	0.23 s	Java	2025-11-29 01:40:25

#	User	Runtime	Language	Date
1	Xiaoyang Xu	0.05 s	Python 3	2025-11-28 02:32:46
2	Ruizhe Jiang	0.05 s	Python 3	2025-12-06 06:10:07
3	Adam Yitao Wang	0.07 s	Python 3	2025-12-08 02:49:09
4	Julia Novick	0.08 s	Python 3	2025-12-04 02:07:18
5	Brian Sen	0.08 s	Python 3	2025-12-04 02:27:26
6	Kennedy Nguyen	0.08 s	Python 3	2025-12-06 08:35:49
7	Saanvi Pabbichetty	0.09 s	Python 3	2025-12-04 01:12:58
8	Sanil Katula	0.10 s	Python 3	2025-11-27 23:15:37
9	Nathan Ngo	0.10 s	Python 3	2025-12-03 08:05:46
10	Mihir Kondapalli	0.11 s	Python 3	2025-12-03 08:22:22

#	User	Runtime	Language	Date
1	Shiyuan Wang	0.15 s	Python 3 with NumPy	2025-12-06 03:37:49

#	User	Length	Language	Date
1	Ezra Furtado-Tiwari	1158	C++	2025-11-29 07:53:44
2	Om Mahesh	1255	C++	2025-12-06 05:45:15
3	Don Tran	1298	C++	2025-12-06 07:00:31
4	Shivane Dadi	1351	C++	2025-12-06 02:38:11
5	Varsha Narasiman	1384	C++	2025-12-05 14:03:04
6	Edric Irimpan	1443	C++	2025-12-04 07:36:08
7	Yiheng Feng	1449	C++	2025-12-06 03:05:17
8	Kenisha Vaswani	1472	C++	2025-12-02 05:51:45
9	Xin Ping Xandra Wong	1522	C++	2025-12-06 07:05:00
10	Hidden user	1552	C++	2025-12-05 09:35:13

#	User	Length	Language	Date
1	Yichen Dai	3280	Java	2025-11-29 01:40:25

#	User	Length	Language	Date
1	Xiaoyang Xu	506	Python 3	2025-11-28 01:58:42
2	Prajwal Vandana	649	Python 3	2025-12-02 01:55:13
3	Sterling Hsu	877	Python 3	2025-12-04 03:45:37
4	David Bazan	887	Python 3	2025-12-04 20:55:59
5	Jason Zhao	938	Python 3	2025-12-05 05:35:35
6	Mihir Kondapalli	1005	Python 3	2025-12-03 08:22:22
7	Aden Jo	1076	Python 3	2025-12-04 09:57:10
8	Nathan Ngo	1121	Python 3	2025-12-03 08:05:46
9	Ruizhe Jiang	1145	Python 3	2025-12-06 06:10:07
10	Sanil Katula	1157	Python 3	2025-11-27 23:15:37

#	User	Length	Language	Date
1	Shiyuan Wang	1962	Python 3 with NumPy	2025-12-06 03:37:49

Solution running time distribution