Problem A
Waif Until Dark — Problem Statistics

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Submissions	3940
Accepted submissions	1380
Submission ratio	35.03%
Authors	975
Full solves [?]	870
Full solve Ratio	89.23%

#	User	Runtime	Language	Date
1	Christoffer Danborg Irvall	0.00 s	C	2020-10-24 12:08:07
2	Mirel Cosulschi	0.00 s	C	2023-01-09 21:14:41
3	Alexander Bilde Pedersen	0.00 s	C	2023-03-07 20:46:38

#	User	Runtime	Language	Date
1	Mathias Brännström	0.02 s	C#	2022-11-18 10:50:21
2	Muskan Shrestha	0.03 s	C#	2020-10-10 19:04:03
3	Alma Freiesleben	0.03 s	C#	2020-10-12 10:09:10
4	Elitsa Marinovska	0.03 s	C#	2020-10-17 19:52:29
5	Magnus Hermansen	0.03 s	C#	2020-10-19 22:59:10
6	David de Lima Fraga Alves	0.03 s	C#	2020-10-20 18:14:19
7	Pavel Dmitriyevich Rodin	0.03 s	C#	2020-10-20 19:10:29
8	Amanda Rasille	0.03 s	C#	2021-10-19 17:42:10
9	Hidden user	0.03 s	C#	2021-10-19 19:38:27
10	Nicolai Pallund	0.03 s	C#	2021-10-23 12:56:11

#	User	Runtime	Language	Date
1	Line Dejgaard	0.00 s	Go	2023-10-04 18:42:52
2	Joshua James Calba	0.00 s	Go	2025-10-21 17:23:49
3	Norbert Voelker	0.08 s	Go	2021-08-17 23:30:48

#	User	Runtime	Language	Date
1	Mahmood Mohammed Seoud	0.05 s	Java	2024-10-13 21:38:37
2	Ellen Yue Daetz	0.05 s	Java	2024-10-14 13:11:46
3	Ivaylo Nikolov	0.05 s	Java	2024-10-22 13:16:07
4	Hidden user	0.05 s	Java	2025-10-21 10:03:14
5	Jakob	0.05 s	Java	2025-10-22 01:56:17
6	Ronald Cruz	0.06 s	Java	2017-11-04 18:37:57
7	Bjørn Dons	0.06 s	Java	2023-06-03 19:06:03
8	Taras Romanyuk	0.06 s	Java	2024-12-18 22:37:04
9	Daniel Moyer	0.07 s	Java	2017-11-04 19:34:35
10	Herbert Li	0.07 s	Java	2017-11-11 03:29:07

#	User	Runtime	Language	Date
1	Oscar Peulicke	0.73 s	JavaScript (Node.js)	2020-10-24 19:45:34

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.04 s	JavaScript (SpiderMonkey)	2024-02-16 00:34:55
2	Christian Pilegaard Cederquist	0.05 s	JavaScript (SpiderMonkey)	2023-06-04 14:16:57

#	User	Runtime	Language	Date
1	Jacob Huebner	0.13 s	Kotlin	2021-04-11 08:38:03
2	Nicholas Johnson	0.16 s	Kotlin	2021-03-30 05:15:21
3	Benjamin Ye	0.16 s	Kotlin	2023-02-12 04:47:11
4	Kiel Dowdle	0.17 s	Kotlin	2021-03-30 21:33:34
5	Mateo Wang	0.20 s	Kotlin	2023-02-18 09:00:11
6	Hidden user	0.22 s	Kotlin	2023-06-20 14:11:59

#	User	Runtime	Language	Date
1	Jesper Öqvist	0.04 s	Python 2	2018-11-10 20:03:59
2	Maj Stenmark	0.05 s	Python 2	2019-10-21 21:24:43
3	Amalie Anderson	0.06 s	Python 2	2020-10-19 19:17:42
4	Andreas Björklund	0.06 s	Python 2	2021-05-27 18:37:53
5	Sebastian Mateos Nicolajsen	0.11 s	Python 2	2020-10-08 08:38:54

#	User	Runtime	Language	Date
1	Torstein Strømme	0.03 s	Python 3	2019-03-26 13:21:30
2	Prateek Bhakta	0.03 s	Python 3	2019-10-14 00:07:48
3	Christoffer Tofteng	0.05 s	Python 3	2022-10-26 10:53:23
4	Casper Rysgaard	0.05 s	Python 3	2024-09-12 14:31:51
5	Otto Jacobsen	0.05 s	Python 3	2024-10-02 10:31:48
6	Mads Greve Andersen	0.05 s	Python 3	2024-10-07 08:30:11
7	Rasmus Balthazar Rødgaard Andreasen	0.05 s	Python 3	2024-10-20 10:12:23
8	Erling Amundsen	0.05 s	Python 3	2024-10-22 14:34:42
9	Aleksandar Obrovac	0.05 s	Python 3	2025-09-01 20:36:04
10	Hidden user	0.05 s	Python 3	2025-10-02 12:33:22

#	User	Runtime	Language	Date
1	Stian Soltvedt	0.00 s	Rust	2019-04-13 11:08:32
2	Adam Guangwei Yu	0.00 s	Rust	2023-02-10 04:03:00
3	Jianghua Wang	0.00 s	Rust	2023-02-14 05:16:47
4	Ryan Chau	0.00 s	Rust	2023-02-17 03:02:17
5	Otakar Hirs	0.00 s	Rust	2023-05-01 19:40:06
6	Tommaso Cammelli	0.00 s	Rust	2023-10-24 16:22:22
7	Bas Dirks	0.00 s	Rust	2024-02-13 10:25:45
8	Emil Hultcrantz	0.00 s	Rust	2025-02-28 14:53:22
9	Johan Flensmark	0.01 s	Rust	2022-10-15 18:31:01
10	Justin Nguyen Vo	0.01 s	Rust	2023-02-12 02:30:29

#	User	Length	Language	Date
1	Mirel Cosulschi	1760	C	2023-01-09 21:14:41
2	Alexander Bilde Pedersen	7577	C	2023-03-07 20:46:38
3	Christoffer Danborg Irvall	13104	C	2020-10-24 12:08:07

#	User	Length	Language	Date
1	Michael Daniel Fabiriucs	3547	C#	2024-10-22 12:25:48
2	Magnus Hermansen	3688	C#	2020-10-19 22:59:10
3	Rafael Steffen Nguyen Jensen	3735	C#	2025-03-21 01:13:45
4	Nicklas Lundsteen Jensen	3822	C#	2025-10-21 15:46:05
5	Frederik Godske Rasmussen	4007	C#	2021-10-20 11:02:19
6	Lukas L. Hjelmstrand	4007	C#	2024-10-14 17:46:15
7	Nicolai Pallund	4172	C#	2021-10-23 12:56:11
8	Viktor Horváth	4179	C#	2025-10-17 18:01:24
9	Hidden user	4258	C#	2021-10-19 19:38:27
10	David de Lima Fraga Alves	4769	C#	2020-10-20 18:14:19

#	User	Length	Language	Date
1	Johan Wind	1141	C++	2018-10-12 22:02:08
2	Zane Yu	1322	C++	2019-01-11 12:55:22
3	Noam Cohen	1431	C++	2022-06-07 14:12:22
4	Ricardo Ruiz	1491	C++	2022-06-14 02:20:42
5	Joseph Richard	1576	C++	2019-05-31 17:20:51
6	Nguyễn Quang Long	1576	C++	2019-05-31 17:21:07
7	Duarte Nóbrega	1604	C++	2019-09-07 18:22:53
8	人外沙耶	1626	C++	2020-12-18 16:50:33
9	Dmitry Lyubshin	1669	C++	2018-07-10 13:08:54
10	Antoni Guz	1709	C++	2018-03-31 22:30:53

#	User	Length	Language	Date
1	Joshua James Calba	4633	Go	2025-10-21 17:23:49
2	Norbert Voelker	4665	Go	2021-08-17 23:30:48
3	Line Dejgaard	6794	Go	2023-10-04 18:42:52

#	User	Length	Language	Date
1	Eimhin McDonald	1858	Java	2017-11-16 20:18:45
2	Sam Huynh	2195	Java	2021-02-21 01:34:16
3	Emilie Hyslop	2280	Java	2021-02-21 01:40:28
4	Doug Goodman	2381	Java	2018-06-12 19:02:35
5	Hidden user	2967	Java	2025-10-21 12:11:25
6	Ronald Cruz	3019	Java	2017-11-04 18:37:57
7	Duncan Page	3047	Java	2019-09-06 02:42:14
8	Crystal Sharpe	3051	Java	2021-02-02 05:17:29
9	Toan Vu	3118	Java	2020-03-11 23:29:11
10	Mahmood Mohammed Seoud	3149	Java	2024-10-13 21:38:37

#	User	Length	Language	Date
1	Oscar Peulicke	3042	JavaScript (Node.js)	2020-10-24 19:45:34

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	1633	JavaScript (SpiderMonkey)	2024-02-16 00:53:48
2	Christian Pilegaard Cederquist	6665	JavaScript (SpiderMonkey)	2023-06-04 14:16:57

#	User	Length	Language	Date
1	Benjamin Ye	464	Kotlin	2023-02-15 07:15:43
2	Hidden user	2005	Kotlin	2023-06-20 14:11:59
3	Mateo Wang	3499	Kotlin	2023-02-18 09:00:11
4	Jacob Huebner	3656	Kotlin	2021-04-11 08:38:03
5	Kiel Dowdle	4986	Kotlin	2021-03-30 21:45:19
6	Nicholas Johnson	5342	Kotlin	2021-03-30 05:15:21

#	User	Length	Language	Date
1	Maj Stenmark	1842	Python 2	2019-10-21 21:24:43
2	Andreas Björklund	2162	Python 2	2021-05-27 18:37:53
3	Jesper Öqvist	4015	Python 2	2018-11-10 20:03:59
4	Sebastian Mateos Nicolajsen	4078	Python 2	2020-10-08 08:42:44
5	Amalie Anderson	7146	Python 2	2020-10-19 19:17:42

#	User	Length	Language	Date
1	Thore Husfeldt	862	Python 3	2020-10-21 20:10:10
2	Christian Lebeda	912	Python 3	2020-10-21 21:13:23
3	Peter Stauder	1103	Python 3	2022-10-16 19:02:34
4	Noah Hessen Bjerke	1109	Python 3	2025-11-08 19:50:29
5	Natalie Clara Petersen	1293	Python 3	2025-10-08 15:04:59
6	Ruben Oliver Jonsman	1367	Python 3	2023-10-07 21:12:41
7	Simon Green Kristensen	1386	Python 3	2022-10-21 15:23:10
8	Robin Ask Rohr Halberg	1389	Python 3	2023-10-04 21:13:09
9	Marius Thomsen	1398	Python 3	2025-10-21 12:24:54
10	Jakob Israelsen	1410	Python 3	2021-04-06 12:33:34

#	User	Length	Language	Date
1	Jianghua Wang	2856	Rust	2023-02-14 05:16:47
2	Stian Soltvedt	3306	Rust	2019-04-13 11:08:32
3	Rolf Martin Glomsrud	3504	Rust	2023-05-15 01:13:43
4	Justin Nguyen Vo	3772	Rust	2023-02-12 02:30:29
5	Daniel Liland	3859	Rust	2023-05-02 19:09:15
6	Tommaso Cammelli	3861	Rust	2023-10-24 16:22:22
7	Bas Dirks	4945	Rust	2024-02-13 10:33:46
8	Otakar Hirs	5405	Rust	2023-05-01 19:40:06
9	Adam Guangwei Yu	6500	Rust	2023-02-10 04:03:00
10	Johan Flensmark	7345	Rust	2022-10-31 12:58:45

Solution running time distribution