Problem A
A Favourable Ending — Problem Statistics

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Submissions	5835
Accepted submissions	1570
Submission ratio	26.91%
Authors	1429
Full solves [?]	1124
Full solve Ratio	78.66%

#	User	Runtime	Language	Date
1	Gagandeep Singh	0.00 s	C	2017-04-05 18:48:18
2	Himanshu Arora	0.00 s	C	2017-04-06 16:06:36
3	Miguel Müller	0.00 s	C	2017-11-21 18:41:43
4	Duane Currie	0.00 s	C	2019-10-25 03:41:03
5	Bergur Snorrason	0.00 s	C	2020-10-23 11:41:13
6	Alexander Bilde Pedersen	0.00 s	C	2023-07-03 16:48:53
7	Christian Jurj	0.00 s	C	2025-04-26 05:10:02
8	Bartosz Hajdas	0.00 s	C	2025-10-20 17:24:16
9	Martin Fornhem	0.00 s	C	2026-02-28 12:42:12
10	Nikita Ivanov	0.00 s	C	2026-03-05 23:40:46

#	User	Runtime	Language	Date
1	Henry Stoldt	0.04 s	C#	2017-09-13 08:27:07
2	Patrik Hammersborg	0.04 s	C#	2018-02-21 20:38:49
3	Diego Rico Reyes	0.05 s	C#	2023-11-27 01:46:04
4	Pablo Quiroz	0.06 s	C#	2025-06-21 05:42:07
5	Leonardo Andrade	0.06 s	C#	2025-06-26 18:36:17
6	Nicolai	0.06 s	C#	2025-11-17 22:40:54
7	Ruslan godiksen	0.06 s	C#	2025-11-19 13:24:32
8	Hidden user	0.06 s	C#	2026-03-05 14:31:17
9	Robin Rausch	0.07 s	C#	2026-03-05 15:16:54

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	D	2025-09-18 18:25:25

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.01 s	Haskell	2025-06-18 08:43:27
2	Brent Yorgey	0.02 s	Haskell	2025-06-09 00:10:32
3	Juan Miguel Vilar	0.04 s	Haskell	2020-09-15 13:30:50
4	Henrik Olsson	0.05 s	Haskell	2018-05-22 20:53:51
5	finiteprods	0.05 s	Haskell	2025-12-03 13:27:38
6	Udo Stenzel	0.06 s	Haskell	2025-06-14 18:15:03

#	User	Runtime	Language	Date
1	Emil Bak-Møller	0.09 s	Java	2020-09-22 21:45:17
2	Derek Thomson	0.09 s	Java	2022-03-10 02:03:50
3	Leon Wang	0.09 s	Java	2024-11-06 15:02:59
4	Fan Wenzhen	0.10 s	Java	2025-12-10 09:39:50
5	Anurag Datta	0.10 s	Java	2025-12-21 03:52:20
6	Jeffrey Xiao	0.12 s	Java	2017-03-19 01:03:13
7	Crystal Sharpe	0.12 s	Java	2020-05-29 05:15:23
8	Taras Romanyuk	0.12 s	Java	2024-12-04 23:05:39
9	Blake Mealey	0.13 s	Java	2017-03-24 18:06:08
10	Daniel Dastoor	0.13 s	Java	2017-03-24 23:19:15

#	User	Runtime	Language	Date
1	Minh Trang Nguyen	0.08 s	JavaScript (Node.js)	2025-12-24 20:07:50
2	Brandon Alejandro Mosqueda González	0.12 s	JavaScript (Node.js)	2023-03-14 13:52:06

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.04 s	JavaScript (SpiderMonkey)	2023-04-28 10:43:45
2	Zach Tschetter	0.05 s	JavaScript (SpiderMonkey)	2025-02-11 02:40:26

#	User	Runtime	Language	Date
1	Jacob Huebner	0.26 s	Kotlin	2020-04-20 23:21:46
2	Hidden user	0.29 s	Kotlin	2019-12-10 22:09:03
3	Hidden user	0.31 s	Kotlin	2023-06-12 14:59:49
4	Jake Bounds	0.36 s	Kotlin	2024-09-27 05:30:06
5	Aksel Holbek Sørbye	0.38 s	Kotlin	2025-12-13 13:55:00
6	Mohsen Dehbashi	0.39 s	Kotlin	2020-03-30 01:07:27

#	User	Runtime	Language	Date
1	RilleP	0.00 s	Odin	2026-03-05 23:44:45
2	Jakob Norell	0.00 s	Odin	2026-03-05 23:55:07

#	User	Runtime	Language	Date
1	Philippe Hubert	0.02 s	PHP	2024-01-01 09:30:23

#	User	Runtime	Language	Date
1	Daniel Strizhevsky	0.07 s	Python 2	2017-10-07 06:19:33
2	Hidden user	0.07 s	Python 2	2017-10-12 18:41:28
3	Andreas Björklund	0.07 s	Python 2	2019-05-21 18:52:29
4	Sean Purcell	0.08 s	Python 2	2017-03-18 20:25:58
5	Maj Stenmark	0.08 s	Python 2	2018-12-02 17:50:29
6	Olav Røthe Bakken	0.09 s	Python 2	2019-06-26 16:11:21
7	Johan Lyts	0.09 s	Python 2	2020-03-13 14:19:45
8	Jesper Öqvist	0.10 s	Python 2	2018-10-17 13:59:36
9	Hidden user	0.10 s	Python 2	2018-12-08 13:32:37
10	John Zheng	0.10 s	Python 2	2021-06-25 05:14:04

#	User	Runtime	Language	Date
1	Ethan Ransom	0.03 s	Python 3	2017-12-29 06:23:42
2	Bredyn McCombs	0.03 s	Python 3	2019-07-30 01:34:18
3	Hua Fan Cai	0.04 s	Python 3	2017-03-18 20:42:20
4	Thomas Vu	0.04 s	Python 3	2017-03-18 23:01:00
5	Victor Zheng	0.04 s	Python 3	2017-03-19 03:49:45
6	Jackie Yu	0.04 s	Python 3	2017-03-22 16:51:04
7	Teresa Van	0.04 s	Python 3	2017-03-23 18:59:37
8	Cian Ruane	0.04 s	Python 3	2017-05-30 16:15:01
9	Ciara Godwin	0.04 s	Python 3	2017-05-30 17:45:43
10	Henning Koehler	0.04 s	Python 3	2017-09-13 02:49:54

#	User	Runtime	Language	Date
1	Chris Jimenez	0.09 s	Ruby	2026-01-11 08:35:46

#	User	Runtime	Language	Date
1	Claes Gustafsson	0.00 s	Rust	2019-01-04 00:08:17
2	David Kaméus	0.00 s	Rust	2022-06-26 18:50:23
3	Vincent Lagerros	0.00 s	Rust	2024-06-01 03:05:10
4	Leonard Jarlskog	0.00 s	Rust	2025-01-14 16:10:26
5	Eric Pinter	0.01 s	Rust	2020-07-26 05:42:24
6	Daniel Anker Hermansen	0.01 s	Rust	2023-05-28 09:37:04
7	Simon Hallefält	0.01 s	Rust	2023-07-15 20:35:49
8	Lasse Grosbøl-Rais	0.01 s	Rust	2023-09-30 06:50:58
9	Erik Magnusson	0.01 s	Rust	2024-02-17 20:57:37
10	Stephen Tozer	0.01 s	Rust	2024-08-09 10:35:57

#	User	Length	Language	Date
1	Gagandeep Singh	1123	C	2017-04-05 18:48:18
2	Himanshu Arora	1348	C	2017-04-06 16:06:36
3	Miguel Müller	1363	C	2017-11-21 18:41:43
4	Martin Fornhem	1548	C	2026-02-28 12:42:12
5	Alexander Bilde Pedersen	1611	C	2023-07-03 16:48:53
6	pengin	1627	C	2022-01-18 11:21:16
7	Christian Jurj	1697	C	2025-04-26 05:10:02
8	Sebastian Urdaneta	1708	C	2025-04-14 18:23:17
9	Bartosz Hajdas	1934	C	2025-10-20 17:24:16
10	Duane Currie	1972	C	2019-10-25 03:41:03

#	User	Length	Language	Date
1	Robin Rausch	1144	C#	2026-03-05 15:16:54
2	Hidden user	1826	C#	2026-03-05 14:39:37
3	Leonardo Andrade	2113	C#	2025-06-26 18:36:17
4	Ruslan godiksen	2196	C#	2025-11-19 13:24:32
5	Nicolai	2310	C#	2025-11-17 22:40:54
6	Diego Rico Reyes	2513	C#	2023-11-27 01:46:04
7	Patrik Hammersborg	2588	C#	2018-02-21 20:38:49
8	Pablo Quiroz	2605	C#	2025-06-21 05:42:07
9	Henry Stoldt	5512	C#	2017-09-13 08:27:07

#	User	Length	Language	Date
1	Nathan Leake	318	C++	2024-02-15 15:57:11
2	Evan Michael Bailey	656	C++	2023-09-14 01:36:14
3	William Gan	693	C++	2018-06-19 05:56:26
4	Antonio Molina Lovett	741	C++	2017-03-18 20:54:46
5	Johan Wind	755	C++	2018-01-14 01:23:15
6	Dominic Dern	807	C++	2023-01-08 09:36:38
7	Leonardo Blanger	829	C++	2021-03-19 21:28:02
8	Minh Huy Nguyễn	840	C++	2020-07-25 20:30:43
9	Dmitry Lyubshin	855	C++	2018-03-19 21:05:44
10	Louis Hugues Randriamora Andriantsiory	855	C++	2018-10-04 13:17:43

#	User	Length	Language	Date
1	Hidden user	1695	D	2025-09-18 18:25:25

#	User	Length	Language	Date
1	Udo Stenzel	568	Haskell	2025-06-14 18:15:03
2	Henrik Olsson	958	Haskell	2018-05-22 20:53:51
3	Steinar Simonnes	1194	Haskell	2025-06-18 08:43:27
4	Brent Yorgey	1633	Haskell	2017-10-14 00:39:33
5	finiteprods	2235	Haskell	2025-12-03 13:27:38
6	Juan Miguel Vilar	5439	Haskell	2020-09-15 13:30:50

#	User	Length	Language	Date
1	David Joy	1078	Java	2020-02-07 16:23:55
2	Doug Goodman	1086	Java	2018-12-15 17:09:26
3	Hidden user	1130	Java	2018-09-14 00:38:50
4	Mohamed Mashaal	1155	Java	2017-09-18 00:58:47
5	Nathan Fowler	1160	Java	2021-11-17 20:47:16
6	Graeme Zinck	1228	Java	2019-01-17 03:08:39
7	Chris Sun	1324	Java	2019-11-21 03:46:00
8	John Copley	1377	Java	2019-08-03 08:57:17
9	Cole Adams	1401	Java	2018-03-14 00:18:39
10	Michael Liu	1422	Java	2018-05-17 19:20:45

#	User	Length	Language	Date
1	Minh Trang Nguyen	1223	JavaScript (Node.js)	2025-12-24 20:07:50
2	Brandon Alejandro Mosqueda González	1891	JavaScript (Node.js)	2023-03-14 13:52:06

#	User	Length	Language	Date
1	Zach Tschetter	642	JavaScript (SpiderMonkey)	2025-02-11 02:40:26
2	Christian Pilegaard Cederquist	985	JavaScript (SpiderMonkey)	2023-04-28 10:43:45

#	User	Length	Language	Date
1	Hidden user	590	Kotlin	2023-06-12 15:05:10
2	Mohsen Dehbashi	755	Kotlin	2020-03-30 01:07:27
3	Jacob Huebner	1145	Kotlin	2020-04-20 23:21:46
4	Jake Bounds	1161	Kotlin	2024-09-27 05:30:06
5	Hidden user	1959	Kotlin	2019-12-10 22:09:03
6	Aksel Holbek Sørbye	49859	Kotlin	2025-12-13 13:55:00

#	User	Length	Language	Date
1	RilleP	1467	Odin	2026-03-05 23:51:21
2	Jakob Norell	2096	Odin	2026-03-05 23:58:15

#	User	Length	Language	Date
1	Philippe Hubert	855	PHP	2024-01-01 09:30:23

#	User	Length	Language	Date
1	Johan Lyts	547	Python 2	2020-03-12 15:19:11
2	Lars Åström	560	Python 2	2019-08-04 17:12:06
3	Hidden user	599	Python 2	2018-12-08 13:32:37
4	Andreas Björklund	608	Python 2	2019-05-21 18:52:29
5	Andreas Eisele	638	Python 2	2018-09-03 17:14:52
6	Olav Røthe Bakken	645	Python 2	2019-06-26 16:11:21
7	Daniel Strizhevsky	668	Python 2	2017-10-07 06:19:33
8	Jesper Öqvist	746	Python 2	2018-10-17 13:59:36
9	Sean Purcell	755	Python 2	2017-03-18 20:25:58
10	Sivasankaran D	778	Python 2	2025-09-07 09:41:48

#	User	Length	Language	Date
1	Teikn Smith	202	Python 3	2023-12-21 00:49:41
2	Lukas Kerren	306	Python 3	2024-04-28 22:04:29
3	Hua Fan Cai	333	Python 3	2017-03-18 20:42:20
4	Victor Zheng	333	Python 3	2017-03-19 03:49:45
5	Martin Muñoz	365	Python 3	2025-01-11 01:33:03
6	Jonathan Dastrup	366	Python 3	2024-05-24 01:38:03
7	Nandan Ramesh	382	Python 3	2023-10-11 04:36:56
8	Lawry Sorenson	387	Python 3	2025-06-05 17:39:09
9	Ahmed Chamseddine	405	Python 3	2024-11-14 22:38:15
10	Isaac Erdman	419	Python 3	2024-05-31 23:19:42

#	User	Length	Language	Date
1	Chris Jimenez	1321	Ruby	2026-01-11 08:35:46

#	User	Length	Language	Date
1	Lasse Grosbøl-Rais	1582	Rust	2023-09-30 06:50:58
2	Simon Hallefält	1878	Rust	2023-07-15 20:46:39
3	David Kaméus	2106	Rust	2022-06-26 18:50:23
4	Claes Gustafsson	2425	Rust	2019-01-04 00:08:17
5	Krish Lal	2961	Rust	2025-09-26 22:28:41
6	Stephen Tozer	3103	Rust	2024-08-09 10:35:57
7	Leonard Jarlskog	3107	Rust	2025-01-14 16:10:26
8	Eric Pinter	3192	Rust	2020-07-26 05:42:24
9	Logan Travis	3318	Rust	2025-09-28 06:02:41
10	Erik Magnusson	5029	Rust	2024-02-17 20:57:37

Solution running time distribution