Problem A
Waif Until Dark — Problem Statistics

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Submissions	1855
Accepted submissions	637
Submission ratio	34.34%
Authors	523
Full solves [?]	470
Full solve Ratio	89.87%

#	User	Runtime	Language	Date
1	Alexander Bilde Pedersen	0.00 s	C	2023-03-07 21:46:38

#	User	Runtime	Language	Date
1	Muskan Shrestha	0.03 s	C#	2020-10-10 21:04:03
2	Alma Freiesleben	0.03 s	C#	2020-10-12 12:09:10
3	Elitsa Marinovska	0.03 s	C#	2020-10-17 21:52:29
4	Magnus Hermansen	0.03 s	C#	2020-10-20 00:59:10
5	David de Lima Fraga Alves	0.03 s	C#	2020-10-20 20:14:19
6	Pavel Dmitriyevich Rodin	0.03 s	C#	2020-10-20 21:10:29
7	Mikkel Østergaard Madsen	0.03 s	C#	2020-10-20 21:31:41
8	Hidden user	0.03 s	C#	2021-10-19 21:38:27
9	Nicolai Pallund	0.03 s	C#	2021-10-23 15:03:53
10	Hampus Iversen	0.03 s	C#	2021-10-24 17:37:45

#	User	Runtime	Language	Date
1	Hjalte Sorgenfrei Mac Dalland	0.00 s	C++	2021-03-30 20:40:24
2	Niels Frederik Starklint Brinck	0.00 s	C++	2021-10-22 22:49:47
3	Daniel Lindholm	0.00 s	C++	2021-10-27 00:43:35
4	Christoffer Jakob Romild Woldbye	0.00 s	C++	2022-03-18 17:15:25
5	Nicolaj Valsted	0.00 s	C++	2022-10-06 18:08:22
6	Cristian Ou	0.00 s	C++	2023-10-21 14:13:58
7	Hidden user	0.00 s	C++	2023-10-22 17:35:53
8	Thomas Suckfüll	0.00 s	C++	2024-10-10 13:31:50
9	Daniel Vikkelsø Held-Hansen	0.00 s	C++	2024-10-22 22:36:05
10	Faisal Osman	0.00 s	C++	2025-10-21 22:03:39

#	User	Runtime	Language	Date
1	Line Dejgaard	0.00 s	Go	2023-10-04 20:42:52
2	Joshua James Calba	0.00 s	Go	2025-10-21 19:23:49

#	User	Runtime	Language	Date
1	Mahmood Mohammed Seoud	0.05 s	Java	2024-10-13 23:38:37
2	Ellen Yue Daetz	0.05 s	Java	2024-10-14 15:12:13
3	Ivaylo Nikolov	0.05 s	Java	2024-10-22 15:16:07
4	Rasmus Herskind	0.05 s	Java	2024-10-22 18:37:36
5	Hidden user	0.05 s	Java	2025-10-21 12:03:14
6	David Carl	0.07 s	Java	2020-10-20 23:39:53
7	Hidden user	0.07 s	Java	2022-10-23 16:01:12
8	Johan Richardt-Bunke	0.07 s	Java	2023-03-19 05:27:38
9	Hidden user	0.07 s	Java	2023-10-19 08:48:42
10	Markus Larion Schlögl	0.07 s	Java	2023-10-23 12:50:01

#	User	Runtime	Language	Date
1	Amalie Anderson	0.06 s	Python 2	2020-10-19 21:17:42
2	Sebastian Mateos Nicolajsen	0.11 s	Python 2	2020-10-08 10:42:44

#	User	Runtime	Language	Date
1	Christoffer Tofteng	0.05 s	Python 3	2022-10-26 12:53:23
2	Otto Jacobsen	0.05 s	Python 3	2024-10-02 12:31:48
3	Mads Greve Andersen	0.05 s	Python 3	2024-10-07 10:30:11
4	Markus Brenken	0.05 s	Python 3	2024-10-10 11:48:19
5	Rasmus Balthazar Rødgaard Andreasen	0.05 s	Python 3	2024-10-20 12:12:23
6	Paula Victoria Menshikoff	0.05 s	Python 3	2024-10-21 19:49:19
7	Erling Amundsen	0.05 s	Python 3	2024-10-22 16:34:42
8	Hidden user	0.05 s	Python 3	2025-10-02 14:33:22
9	Hidden user	0.05 s	Python 3	2025-10-08 07:41:03
10	Hidden user	0.05 s	Python 3	2025-10-13 10:20:38

#	User	Runtime	Language	Date
1	Andreas Neocleous	0.05 s	Python 3 with NumPy	2025-10-17 11:56:03
2	Hidden user	0.05 s	Python 3 with NumPy	2025-10-21 09:35:08
3	Giulia Pinciroli	0.06 s	Python 3 with NumPy	2024-10-17 14:09:51
4	Costel Gutu	0.06 s	Python 3 with NumPy	2025-10-10 14:35:01
5	Ondrej Kozanyi	0.06 s	Python 3 with NumPy	2025-10-10 23:40:29
6	Hidden user	0.06 s	Python 3 with NumPy	2025-10-12 19:45:22
7	Emil Fuhr Nielsen	0.06 s	Python 3 with NumPy	2025-10-14 12:05:03
8	Hidden user	0.06 s	Python 3 with NumPy	2025-10-14 13:56:44
9	Jakub Kozanyi	0.06 s	Python 3 with NumPy	2025-10-21 14:10:14
10	Hidden user	0.07 s	Python 3 with NumPy	2023-10-18 23:46:18

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Rust	2021-10-18 17:00:42
2	Tommaso Cammelli	0.00 s	Rust	2023-10-24 18:23:03
3	Johan Flensmark	0.01 s	Rust	2022-10-15 20:32:10
4	Mads Brøndum	0.02 s	Rust	2022-11-01 18:16:17

#	User	Length	Language	Date
1	Alexander Bilde Pedersen	7577	C	2023-03-07 21:46:38

#	User	Length	Language	Date
1	Michael Daniel Fabiriucs	3547	C#	2024-10-22 14:25:48
2	Magnus Hermansen	3688	C#	2020-10-20 00:59:10
3	Rafael Steffen Nguyen Jensen	3735	C#	2025-03-21 02:13:45
4	Nicklas Lundsteen Jensen	3822	C#	2025-10-21 17:46:05
5	Frederik Godske Rasmussen	4007	C#	2021-10-20 13:02:19
6	Lukas L. Hjelmstrand	4007	C#	2024-10-14 19:46:15
7	Nicolai Pallund	4174	C#	2021-10-23 15:03:53
8	Viktor Horváth	4179	C#	2025-10-17 20:01:24
9	Hidden user	4258	C#	2021-10-19 21:38:27
10	David de Lima Fraga Alves	4769	C#	2020-10-20 20:14:19

#	User	Length	Language	Date
1	Hidden user	1677	C++	2022-11-02 22:56:29
2	Hjalte Sorgenfrei Mac Dalland	2252	C++	2021-03-30 20:40:24
3	Mai Odgaard	2267	C++	2023-10-09 22:43:30
4	Faisal Osman	3256	C++	2025-10-21 22:03:39
5	Alexander Maajgard Wermuth	3308	C++	2022-11-02 15:28:48
6	Hidden user	3311	C++	2020-10-20 21:15:22
7	Daniel Lindholm	3323	C++	2021-10-27 00:43:35
8	Nicolaj Valsted	3349	C++	2022-10-06 18:08:22
9	Hidden user	3832	C++	2020-10-19 18:42:15
10	Andrada Condor	3952	C++	2024-10-10 21:01:08

#	User	Length	Language	Date
1	Joshua James Calba	4633	Go	2025-10-21 19:23:49
2	Line Dejgaard	6794	Go	2023-10-04 20:42:52

#	User	Length	Language	Date
1	Hidden user	2967	Java	2025-10-21 14:11:25
2	Mahmood Mohammed Seoud	3149	Java	2024-10-13 23:38:37
3	amanda bache	3197	Java	2024-10-22 13:52:26
4	Imaz Naseem	3222	Java	2025-10-22 00:29:44
5	Niclas Søgaard Hjortkjær	3255	Java	2024-10-14 10:47:30
6	Asger Lademark Heegaard	3413	Java	2023-10-25 00:00:32
7	Markus Brandt Højgaard	3501	Java	2025-10-04 15:48:52
8	Daniel Gjesse Kjellberg	3522	Java	2022-10-22 10:33:00
9	Hidden user	3653	Java	2021-10-15 19:32:08
10	Hidden user	3682	Java	2025-10-20 14:35:36

#	User	Length	Language	Date
1	Sebastian Mateos Nicolajsen	4078	Python 2	2020-10-08 10:42:44
2	Amalie Anderson	7146	Python 2	2020-10-19 21:17:42

#	User	Length	Language	Date
1	Thore Husfeldt	905	Python 3	2020-10-21 16:19:29
2	Christian Lebeda	912	Python 3	2020-10-21 23:13:23
3	Natalie Clara Petersen	1293	Python 3	2025-10-08 17:04:59
4	Lukas Ditlevsen	1303	Python 3	2025-10-21 21:03:36
5	Robin Ask Rohr Halberg	1389	Python 3	2023-10-04 23:13:09
6	Marius Thomsen	1398	Python 3	2025-10-21 14:24:54
7	Hidden user	1434	Python 3	2023-10-24 16:02:49
8	Hidden user	1455	Python 3	2025-10-21 20:24:25
9	Bjarke Brodin	1468	Python 3	2022-10-17 23:26:47
10	Jakob Israelsen	1472	Python 3	2021-04-06 14:34:16

#	User	Length	Language	Date
1	Símun Larsson Løkke Rasmussen	2007	Python 3 with NumPy	2025-03-21 10:42:51
2	Andreas Neocleous	2446	Python 3 with NumPy	2025-10-17 11:56:03
3	Hidden user	2617	Python 3 with NumPy	2025-10-12 19:45:22
4	Jakub Kozanyi	2686	Python 3 with NumPy	2025-10-21 14:10:14
5	Giulia Pinciroli	2789	Python 3 with NumPy	2024-10-17 14:09:51
6	Emil Fuhr Nielsen	2901	Python 3 with NumPy	2025-10-14 12:05:03
7	Hidden user	2950	Python 3 with NumPy	2025-10-21 09:35:08
8	Costel Gutu	3044	Python 3 with NumPy	2025-10-10 14:35:01
9	Hidden user	3143	Python 3 with NumPy	2023-10-18 23:44:26
10	Rabia Abu Sufian	3327	Python 3 with NumPy	2024-10-21 23:42:39

#	User	Length	Language	Date
1	Tommaso Cammelli	3861	Rust	2023-10-24 18:23:03
2	Johan Flensmark	7345	Rust	2022-10-31 13:58:45
3	Mads Brøndum	7541	Rust	2022-11-01 18:16:17
4	Hidden user	8574	Rust	2021-10-18 17:00:42

Solution running time distribution