Problem A
Joint Attack — Problem Statistics

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Submissions	1682
Accepted submissions	815
Submission ratio	48.45%
Authors	767
Full solves [?]	689
Full solve Ratio	89.83%

#	User	Runtime	Language	Date
1	Sébastien Paumier	0.02 s	C#	2018-11-10 13:07:06
2	Esty Crow	0.04 s	C#	2023-06-03 22:31:13
3	Anthony Ye	0.04 s	C#	2023-06-04 18:28:55

#	User	Runtime	Language	Date
1	Timothy Bilik	0.01 s	Common Lisp	2022-09-24 18:44:36
2	David Cawthon	0.02 s	Common Lisp	2019-05-18 23:20:11
3	Hidden user	0.02 s	Common Lisp	2019-06-20 10:39:57

#	User	Runtime	Language	Date
1	Hjalte Sorgenfrei Mac Dalland	0.04 s	F#	2020-02-07 16:17:16
2	Jacob Harris Cryer Kragh	0.05 s	F#	2023-02-25 12:16:05

#	User	Runtime	Language	Date
1	Ian Howell	0.02 s	Go	2019-08-16 21:55:13
2	Arne Philipeit	0.07 s	Go	2019-10-01 21:32:04
3	Hidden user	0.08 s	Go	2019-10-03 18:54:59
4	Norbert Voelker	0.08 s	Go	2021-08-20 14:25:17

#	User	Runtime	Language	Date
1	Birk Tjelmeland	0.00 s	Haskell	2019-05-07 11:59:06
2	Jason Hooper	0.00 s	Haskell	2019-09-18 22:08:30
3	Steinar Simonnes	0.00 s	Haskell	2024-05-07 09:17:49
4	Brent Yorgey	0.01 s	Haskell	2018-11-20 14:45:04
5	Aurélien Pepin	0.01 s	Haskell	2019-09-05 10:30:02
6	Hidden user	0.01 s	Haskell	2019-10-27 12:18:49
7	Stian	0.01 s	Haskell	2021-10-14 21:29:12

#	User	Runtime	Language	Date
1	Tore Aadland	0.05 s	Java	2018-11-10 12:32:12
2	Kristian Rosland	0.05 s	Java	2018-11-10 12:47:29
3	Petter Daae	0.05 s	Java	2018-11-10 13:24:57
4	Karl Henrik Elg Barlinn	0.05 s	Java	2018-11-10 13:35:56
5	Vegard Nerhus	0.05 s	Java	2018-11-10 13:43:33
6	Hidden user	0.05 s	Java	2018-11-10 14:36:22
7	Joakim Algrøy	0.05 s	Java	2018-11-12 21:59:12
8	Benjamin Reidys	0.05 s	Java	2018-11-18 02:57:09
9	Magnus Øian	0.05 s	Java	2018-12-04 23:55:29
10	Sondre Nilsen	0.06 s	Java	2018-11-10 15:44:39

#	User	Runtime	Language	Date
1	Samuel Högfeldt	0.08 s	JavaScript (Node.js)	2022-08-26 16:59:34

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-05-24 11:28:08
2	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2025-07-23 23:55:35
3	Bjørn Chr. Soltvedt	0.05 s	JavaScript (SpiderMonkey)	2018-11-11 22:27:03

#	User	Runtime	Language	Date
1	Timothy Gaede	0.61 s	Julia	2024-08-08 04:53:39

#	User	Runtime	Language	Date
1	Jacob Huebner	0.13 s	Kotlin	2022-02-05 17:37:07
2	Nicholas Johnson	0.13 s	Kotlin	2022-02-05 21:55:38
3	Arve Skogvold	0.20 s	Kotlin	2018-11-16 13:52:42
4	Neil Harmon	0.20 s	Kotlin	2019-10-29 12:12:10
5	Ali M. Nekoh	0.22 s	Kotlin	2025-06-19 13:31:16

#	User	Runtime	Language	Date
1	Ivan Miloslavov	0.00 s	OCaml	2020-05-21 00:51:43

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2020-03-09 14:47:01

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2018-12-10 17:05:29

#	User	Runtime	Language	Date
1	Lars Åström	0.03 s	Python 2	2018-11-10 12:16:22
2	Hidden user	0.03 s	Python 2	2018-12-08 15:37:20
3	Johann Ly	0.03 s	Python 2	2018-12-16 22:45:13
4	Andreas Björklund	0.03 s	Python 2	2018-12-24 06:28:12
5	Johan Lyts	0.03 s	Python 2	2019-03-09 22:04:54
6	Maj Stenmark	0.03 s	Python 2	2019-09-09 20:12:26
7	Fromsa Hera	0.04 s	Python 2	2018-11-10 11:55:26
8	Amar Topalovic	0.04 s	Python 2	2018-11-10 18:06:59
9	Øyvind Haarberg	0.04 s	Python 2	2018-11-11 19:43:25
10	Dmitry Lyubshin	0.04 s	Python 2	2018-11-12 04:58:30

#	User	Runtime	Language	Date
1	Håkon Osland	0.02 s	Python 3	2018-11-10 12:17:00
2	Thomas Sell-Dyngeland	0.02 s	Python 3	2018-11-10 13:12:19
3	Steffen Grønmo	0.02 s	Python 3	2018-11-10 14:29:25
4	André Berge	0.02 s	Python 3	2018-11-10 14:47:52
5	Ram Basnet	0.02 s	Python 3	2018-11-13 04:49:03
6	Muhammad Ayaz Dzulfikar	0.02 s	Python 3	2018-12-03 16:51:55
7	Kasra Ghodsi	0.02 s	Python 3	2018-12-04 23:55:03
8	Hakan Celik	0.02 s	Python 3	2018-12-14 09:29:45
9	Bjørn Dons	0.02 s	Python 3	2018-12-28 02:19:13
10	Noah Hunt-Isaak	0.02 s	Python 3	2019-03-14 17:52:01

#	User	Runtime	Language	Date
1	Donald Dong	0.04 s	Ruby	2019-03-05 07:49:29
2	Hidden user	0.04 s	Ruby	2019-10-01 21:03:34
3	Macdara mac an tSionnaigh	0.04 s	Ruby	2019-10-01 21:28:24
4	Miorel Palii	0.05 s	Ruby	2022-03-23 08:28:11
5	Thomas Feld	0.06 s	Ruby	2023-02-13 15:05:06

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Rust	2019-11-24 20:54:03
2	Haggi Haggi	0.00 s	Rust	2019-11-24 22:20:32
3	Eric Pinter	0.00 s	Rust	2020-01-11 03:11:10
4	David Rasch	0.00 s	Rust	2022-11-11 16:45:19
5	Trygve Eide Igesund	0.00 s	Rust	2023-04-03 00:14:57
6	Erik Orring	0.00 s	Rust	2024-02-11 21:28:26
7	Bas Dirks	0.00 s	Rust	2025-01-24 08:08:57

#	User	Runtime	Language	Date
1	Ștefan-Iulian Alecu	0.04 s	Visual Basic	2025-11-02 20:07:25

#	User	Length	Language	Date
1	Naveen Kumar S	356	C	2025-04-26 15:20:59
2	waiting chen	488	C	2025-01-01 18:19:17
3	徐緯倫	520	C	2023-11-19 14:55:18
4	PRINCE NYANTI	606	C	2025-12-02 03:03:00
5	Mirel Cosulschi	651	C	2023-11-19 23:58:33
6	Ivan Petrov	655	C	2019-11-04 15:44:21
7	Jack Gurdin	677	C	2023-11-01 06:20:59
8	好吃雞蛋	848	C	2025-10-17 04:16:06
9	Bardiya Rasekh	876	C	2021-11-23 00:12:33
10	Ariya Rasekh	892	C	2021-11-23 00:12:12

#	User	Length	Language	Date
1	Esty Crow	630	C#	2023-06-03 22:31:13
2	Anthony Ye	636	C#	2023-06-04 18:28:55
3	Sébastien Paumier	822	C#	2018-11-10 13:07:06

#	User	Length	Language	Date
1	陳善元	259	C++	2023-07-14 18:17:27
2	Hidden user	268	C++	2020-03-08 14:38:00
3	William Gan	288	C++	2018-12-04 17:05:11
4	程睿	305	C++	2025-05-18 08:22:21
5	吳昀哲	316	C++	2023-08-03 07:01:51
6	陳善元	319	C++	2023-07-21 08:00:25
7	流風	333	C++	2023-11-16 15:40:15
8	Nguyễn Thành Minh	337	C++	2022-02-05 22:39:12
9	Way Tan	338	C++	2018-12-03 10:35:52
10	吳俊寬	338	C++	2024-12-04 08:36:17

#	User	Length	Language	Date
1	Timothy Bilik	131	Common Lisp	2022-09-24 18:44:36
2	Hidden user	351	Common Lisp	2019-06-20 10:39:57
3	David Cawthon	385	Common Lisp	2019-05-18 23:20:11

#	User	Length	Language	Date
1	Hjalte Sorgenfrei Mac Dalland	577	F#	2020-02-07 16:17:16
2	Jacob Harris Cryer Kragh	806	F#	2023-02-25 12:16:05

#	User	Length	Language	Date
1	Arne Philipeit	520	Go	2019-10-01 21:32:04
2	Ian Howell	595	Go	2019-08-16 21:55:13
3	Hidden user	742	Go	2019-10-03 18:54:59
4	Norbert Voelker	819	Go	2021-08-20 15:51:11

#	User	Length	Language	Date
1	Hidden user	274	Haskell	2019-10-27 12:18:49
2	Birk Tjelmeland	281	Haskell	2019-05-07 11:59:06
3	Steinar Simonnes	496	Haskell	2024-05-07 09:18:49
4	Brent Yorgey	836	Haskell	2018-11-20 14:45:04
5	Aurélien Pepin	1004	Haskell	2019-09-05 10:30:02
6	Jason Hooper	2801	Haskell	2019-09-18 22:17:16
7	Stian	3040	Haskell	2021-10-14 21:29:12

#	User	Length	Language	Date
1	Matt Peter	546	Java	2019-02-23 03:06:27
2	Fredrik Lygre Bergesen	562	Java	2018-11-10 12:06:06
3	Mariann Løtvedt	577	Java	2022-07-14 15:48:46
4	Eric Leow Yu Quan	665	Java	2021-01-02 09:40:59
5	Likhitha Sadavala	691	Java	2022-07-25 19:12:07
6	Crystal Sharpe	694	Java	2020-07-13 17:16:02
7	Varshini Raghunath	760	Java	2025-06-19 18:47:51
8	Markus Bao	771	Java	2024-01-08 02:57:38
9	Reuben James Loquinario	771	Java	2025-11-28 04:27:47
10	Randall Scharpf	786	Java	2022-02-07 04:29:46

#	User	Length	Language	Date
1	Samuel Högfeldt	1166	JavaScript (Node.js)	2022-08-26 16:59:34

#	User	Length	Language	Date
1	Jimmy Gustafsson	157	JavaScript (SpiderMonkey)	2025-07-23 23:55:35
2	Christian Pilegaard Cederquist	438	JavaScript (SpiderMonkey)	2023-05-24 11:28:08
3	Bjørn Chr. Soltvedt	24407	JavaScript (SpiderMonkey)	2018-11-11 22:27:03

#	User	Length	Language	Date
1	Timothy Gaede	502	Julia	2024-08-08 04:53:39

#	User	Length	Language	Date
1	Ali M. Nekoh	423	Kotlin	2025-06-19 13:31:16
2	Arve Skogvold	1481	Kotlin	2018-11-16 13:52:42
3	Neil Harmon	1486	Kotlin	2019-10-29 12:12:10
4	Jacob Huebner	1645	Kotlin	2022-02-05 17:37:07
5	Nicholas Johnson	2406	Kotlin	2022-02-05 21:55:38

#	User	Length	Language	Date
1	Ivan Miloslavov	392	OCaml	2020-05-21 00:51:43

#	User	Length	Language	Date
1	Ingemar Ragnemalm	1995	Pascal	2020-03-09 14:47:01

#	User	Length	Language	Date
1	Andriy Zyevakov	636	Prolog	2018-12-10 17:05:29

#	User	Length	Language	Date
1	Andreas Björklund	158	Python 2	2018-12-24 06:28:12
2	Thomas Feld	167	Python 2	2019-09-25 16:21:49
3	Justin Su	170	Python 2	2019-10-09 07:45:36
4	Lars Åström	174	Python 2	2018-11-10 12:16:22
5	Dmitry Lyubshin	191	Python 2	2018-11-12 04:58:30
6	Fromsa Hera	242	Python 2	2018-11-10 11:55:26
7	Markus Fanebust Dregi	263	Python 2	2018-11-10 11:27:38
8	Amar Topalovic	277	Python 2	2018-11-10 18:06:59
9	Ethan Arnold	283	Python 2	2018-12-21 01:47:04
10	Catalin Popa	343	Python 2	2019-01-11 18:59:04

#	User	Length	Language	Date
1	Hidden user	102	Python 3	2025-12-07 08:44:00
2	Peter Stauder	107	Python 3	2022-08-19 21:28:29
3	Charles Ancheta	110	Python 3	2023-04-13 01:34:32
4	Shashank Bhatt	111	Python 3	2022-02-09 21:51:56
5	Rafael Kristoforus Yanto	117	Python 3	2025-02-21 05:19:17
6	Michael Goldwasser	121	Python 3	2024-05-20 22:19:19
7	Ahmed Chamseddine	133	Python 3	2024-09-18 16:50:51
8	Alexandre Douard	134	Python 3	2023-09-29 11:12:15
9	Nino Bašić	140	Python 3	2023-01-05 15:58:27
10	Tai Tze Kin	141	Python 3	2024-05-04 21:29:00

#	User	Length	Language	Date
1	Thomas Feld	54	Ruby	2023-02-13 15:05:06
2	Donald Dong	127	Ruby	2019-03-05 07:49:29
3	Miorel Palii	131	Ruby	2022-03-23 08:28:11
4	Hidden user	192	Ruby	2019-10-01 22:23:51
5	Macdara mac an tSionnaigh	320	Ruby	2019-10-01 21:28:24

#	User	Length	Language	Date
1	Eric Pinter	362	Rust	2020-01-11 03:11:10
2	Bas Dirks	516	Rust	2025-01-24 08:08:57
3	Erik Orring	828	Rust	2024-02-11 21:28:26
4	Hidden user	877	Rust	2019-11-24 21:59:59
5	Trygve Eide Igesund	993	Rust	2023-04-03 00:14:57
6	Haggi Haggi	1560	Rust	2019-11-24 22:20:32
7	David Rasch	3582	Rust	2022-11-11 16:45:19

#	User	Length	Language	Date
1	Ștefan-Iulian Alecu	698	Visual Basic	2025-11-02 20:07:25

Solution running time distribution