Problem A
Army Strength (Hard) — Problem Statistics

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Submissions	6755
Accepted submissions	3402
Submission ratio	50.36%
Authors	2699
Full solves [?]	2453
Full solve Ratio	90.89%

#	User	Runtime	Language	Date
1	Kenneth Langedal	0.00 s	C	2022-11-17 15:41:10
2	Johannes Olegård	0.01 s	C	2014-08-25 03:04:03
3	Eyleifur Bjarkason	0.01 s	C	2019-03-23 16:26:57
4	Garðar Ingvarsson	0.01 s	C	2019-04-11 04:25:52
5	Agis Daniels	0.01 s	C	2022-01-09 18:34:38
6	Jakob Norell	0.01 s	C	2024-07-03 22:14:26
7	Mirel Cosulschi	0.01 s	C	2025-01-09 22:42:15
8	Daniel Remseth	0.01 s	C	2025-10-22 14:10:49
9	Aked Hindi	0.03 s	C	2013-02-05 15:25:42
10	Blake Hyde	0.03 s	C	2017-01-28 20:16:50

#	User	Runtime	Language	Date
1	Joe Amenta	0.03 s	C#	2018-05-13 23:34:29
2	Nathan Andrews	0.11 s	C#	2024-08-24 00:10:25
3	Robin Chandra	0.17 s	C#	2018-12-21 09:42:43
4	Paweł Janiszewski	0.18 s	C#	2013-10-10 20:23:46
5	Marcin Nowak	0.18 s	C#	2014-10-05 08:43:57
6	Ziga Staresinic	0.18 s	C#	2016-12-06 20:26:16
7	Joshua Jealouse	0.18 s	C#	2017-02-07 01:41:54
8	Klas af Geijerstam	0.18 s	C#	2017-06-02 11:38:47
9	Jukka Paajanen	0.18 s	C#	2017-11-10 17:25:03
10	Timur Fayzrakhmanov	0.19 s	C#	2014-07-08 14:46:00

#	User	Runtime	Language	Date
1	Blake Lasky	0.01 s	C++	2016-11-08 13:56:10
2	Grae Yeandle	0.01 s	C++	2016-11-26 19:12:32
3	Hidden user	0.01 s	C++	2017-07-25 22:07:39
4	Karl Siegfried Lizaso	0.01 s	C++	2017-12-12 07:49:41
5	Lee Geng Yu	0.01 s	C++	2018-02-08 07:01:03
6	Hannes Bredberg	0.01 s	C++	2018-03-28 15:37:53
7	traxex	0.01 s	C++	2018-04-15 09:40:10
8	Troels Bjerre Lund	0.01 s	C++	2018-11-05 22:40:21
9	Chan Zhi Zheng Amos	0.01 s	C++	2019-03-21 12:30:08
10	Garðar Ingvarsson	0.01 s	C++	2019-04-11 04:20:27

#	User	Runtime	Language	Date
1	David Cawthon	0.61 s	Common Lisp	2020-09-13 05:43:35

#	User	Runtime	Language	Date
1	Hidden user	0.42 s	F#	2021-07-05 22:31:18

#	User	Runtime	Language	Date
1	Krzysztof Gibuła	0.16 s	Go	2019-02-25 20:16:51
2	Hidden user	0.21 s	Go	2018-05-03 01:31:04

#	User	Runtime	Language	Date
1	Udo Stenzel	0.02 s	Haskell	2023-04-15 16:17:32
2	Isaac Arvestad	0.03 s	Haskell	2019-10-17 11:06:15
3	Brent Yorgey	0.04 s	Haskell	2019-10-11 23:57:40
4	Abel Martin	0.04 s	Haskell	2019-10-13 10:44:45
5	Aaron Lengyel	0.04 s	Haskell	2022-07-14 23:15:31
6	Xee	0.04 s	Haskell	2024-02-01 10:05:19
7	TJ Takei	0.04 s	Haskell	2025-03-08 11:10:13
8	Shinji Koshida	0.04 s	Haskell	2025-03-19 10:18:08
9	Hussain Sobhy	0.04 s	Haskell	2025-05-10 21:32:07
10	Oliver Pauffley	0.04 s	Haskell	2025-06-20 17:34:52

#	User	Runtime	Language	Date
1	Đức Phạm Hoài	0.08 s	Java	2018-07-10 18:52:18
2	Sven Rönnbäck	0.08 s	Java	2023-06-03 12:26:16
3	Nguyễn Mạnh Phúc	0.09 s	Java	2015-10-24 05:04:56
4	Trần Công Duy	0.09 s	Java	2016-07-28 16:11:41
5	Đỗ Duy Tân	0.09 s	Java	2016-08-24 08:23:16
6	Tú Huỳnh	0.09 s	Java	2016-08-24 08:31:50
7	Khánh Nguyễn Tiến	0.09 s	Java	2018-07-10 22:25:08
8	William Fiset	0.10 s	Java	2016-07-11 00:40:06
9	Jan Štola	0.11 s	Java	2015-03-16 22:30:11
10	Orestis Foufris	0.11 s	Java	2016-07-16 22:05:16

#	User	Runtime	Language	Date
1	Aldo Luna Bueno	0.13 s	JavaScript (Node.js)	2024-11-15 20:34:10
2	Mikael Fiala-Lundström	0.53 s	JavaScript (Node.js)	2021-06-21 17:52:55
3	Howard Tin Chi Chan	0.54 s	JavaScript (Node.js)	2021-03-21 19:48:49
4	Shinno K	0.75 s	JavaScript (Node.js)	2020-03-01 15:02:31
5	Stephanie Keck	0.78 s	JavaScript (Node.js)	2020-01-31 23:39:07

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.09 s	JavaScript (SpiderMonkey)	2023-02-05 09:06:26
2	Jimmy Gustafsson	0.12 s	JavaScript (SpiderMonkey)	2024-08-27 23:56:26
3	Magnar Myrtveit	0.14 s	JavaScript (SpiderMonkey)	2016-12-26 20:33:12
4	Bjørn Chr. Soltvedt	0.14 s	JavaScript (SpiderMonkey)	2019-11-07 10:03:36
5	J M	0.18 s	JavaScript (SpiderMonkey)	2016-10-26 19:47:40
6	Nicklas Utgaard	0.21 s	JavaScript (SpiderMonkey)	2023-12-02 19:39:20
7	Hà Minh Ngọc	0.22 s	JavaScript (SpiderMonkey)	2016-07-26 14:46:57
8	Hidden user	0.22 s	JavaScript (SpiderMonkey)	2016-07-27 09:08:35

#	User	Runtime	Language	Date
1	Timothy Gaede	0.63 s	Julia	2024-07-03 04:08:15
2	Hidden user	0.84 s	Julia	2025-04-08 22:33:31

#	User	Runtime	Language	Date
1	Jacob Huebner	0.28 s	Kotlin	2021-06-03 00:24:39
2	Silas Lenz	0.50 s	Kotlin	2019-02-14 14:36:29
3	Adam Rankin	0.61 s	Kotlin	2023-05-10 05:30:54
4	Dmitry Shostak	0.72 s	Kotlin	2019-09-23 07:15:21
5	Troy Warmboe	0.75 s	Kotlin	2020-02-05 22:29:23
6	Neil Harmon	0.87 s	Kotlin	2019-07-26 15:43:48
7	Dayan Ruben Gonzalez	0.87 s	Kotlin	2020-09-28 23:14:10

#	User	Runtime	Language	Date
1	Caleb Austin	0.09 s	Lua	2024-08-28 22:50:26

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.05 s	Pascal	2017-11-28 15:27:22
2	Magnus Ragnemalm	0.05 s	Pascal	2017-11-29 12:22:21

#	User	Runtime	Language	Date
1	Silvena Lam	0.04 s	PHP	2016-06-06 16:24:13
2	陳建宏	0.05 s	PHP	2021-06-25 18:22:11

#	User	Runtime	Language	Date
1	Erik Sillén	0.07 s	Python 2	2015-10-17 01:05:15
2	Martin Vonheim Larsen	0.08 s	Python 2	2018-05-22 14:07:00
3	Marius Thoresen	0.08 s	Python 2	2018-05-22 14:20:19
4	Mark van Helvoort	0.08 s	Python 2	2018-11-08 16:12:28
5	Joseph Ciminski	0.08 s	Python 2	2019-08-12 01:10:41
6	Kasper Borys	0.08 s	Python 2	2019-08-20 21:26:48
7	Thomas Feld	0.08 s	Python 2	2019-08-22 10:13:24
8	Guan Yang Ze	0.08 s	Python 2	2019-08-27 09:46:39
9	Klas Björkqvist	0.09 s	Python 2	2014-07-19 17:29:29
10	Gustaf Waldemarson	0.09 s	Python 2	2014-08-12 18:28:31

#	User	Runtime	Language	Date
1	Joey Quinlan	0.09 s	Python 3	2022-06-25 19:52:05
2	Kattis Speedrun	0.09 s	Python 3	2022-07-22 05:50:41
3	Tobias Glimmerfors	0.09 s	Python 3	2022-08-07 14:35:24
4	Petr	0.09 s	Python 3	2024-11-12 16:40:48
5	Guk Yi Siong	0.09 s	Python 3	2024-11-22 02:23:46
6	Hamdanil Rasyid	0.09 s	Python 3	2025-01-15 05:42:14
7	Hrant Hovhannisyan	0.09 s	Python 3	2025-02-13 09:33:21
8	Fredrik Niemelä	0.09 s	Python 3	2025-08-10 05:42:28
9	Varshini M	0.09 s	Python 3	2025-08-11 15:22:02
10	Naveen Prasanth V	0.09 s	Python 3	2025-08-11 15:22:13

#	User	Runtime	Language	Date
1	Daniel Harder	0.13 s	Ruby	2018-09-01 02:58:10
2	Shayon Mukherjee	0.14 s	Ruby	2016-03-08 04:42:29
3	Casper Christensen	0.15 s	Ruby	2016-01-24 17:12:28
4	Erik Rydbert	0.15 s	Ruby	2016-07-20 10:22:27
5	Hidden user	0.16 s	Ruby	2018-06-24 23:12:54
6	Conor O'Brien	0.17 s	Ruby	2022-02-08 23:38:32
7	Thomas Feld	0.17 s	Ruby	2023-03-30 12:26:13
8	Alexander Bilde Pedersen	0.17 s	Ruby	2024-12-03 16:33:27
9	Macdara mac an tSionnaigh	0.18 s	Ruby	2019-10-04 18:41:04
10	Lasse Berglund	0.21 s	Ruby	2016-06-23 03:29:14

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2025-02-17 14:58:10
2	Joe Amenta	0.01 s	Rust	2022-09-25 16:50:06
3	Shivam Thakur	0.02 s	Rust	2019-06-28 00:00:06
4	Hidden user	0.02 s	Rust	2021-02-26 12:44:37
5	Eric Pinter	0.02 s	Rust	2021-05-28 23:01:57
6	Norbert Voelker	0.02 s	Rust	2021-06-11 01:28:52
7	David Zacek	0.02 s	Rust	2021-09-05 18:12:01
8	Daniel Anker Hermansen	0.02 s	Rust	2024-06-14 11:27:52
9	Egor Kulikov	0.02 s	Rust	2025-01-07 18:47:00
10	Joe Blower	0.02 s	Rust	2025-09-01 03:05:34

#	User	Length	Language	Date
1	José Lucas	324	C	2016-04-07 21:47:40
2	Velvet	406	C	2020-11-20 04:36:27
3	Anders Westling	419	C	2012-09-30 15:37:40
4	Wu Haitao	498	C	2019-09-06 06:11:57
5	Bai Yunwei	505	C	2018-05-31 11:45:54
6	Sambit Palit	510	C	2020-09-24 04:42:01
7	Jiangfeng Du	529	C	2019-03-20 10:00:09
8	Herbert Ilhan Tanujaya	534	C	2016-03-10 17:24:38
9	Esther Chong	559	C	2019-09-11 11:03:02
10	Mirel Cosulschi	566	C	2025-01-09 22:40:12

#	User	Length	Language	Date
1	Marek Bina	599	C#	2019-02-19 14:18:44
2	Nathan Andrews	782	C#	2024-08-24 00:10:25
3	Bas te Kolste	810	C#	2015-06-15 22:25:52
4	Klas af Geijerstam	853	C#	2017-06-02 11:38:47
5	Marcin Nowak	867	C#	2014-10-05 08:43:57
6	Ziga Staresinic	910	C#	2016-12-06 20:27:52
7	Paweł Janiszewski	933	C#	2013-10-10 20:23:46
8	Sebastian Sternberg	1168	C#	2021-02-22 21:01:18
9	Henrik Hallbert	1212	C#	2022-01-11 21:21:55
10	Chase Oberg	1232	C#	2018-03-02 15:02:51

#	User	Length	Language	Date
1	Johan Olsson	249	C++	2025-10-22 20:55:36
2	Frans Meulenbroeks	263	C++	2024-10-30 13:13:19
3	Herman Karlsson	266	C++	2015-02-12 23:51:51
4	Subramanian Ramasamy	296	C++	2022-09-01 08:55:18
5	Tyler Fernando	304	C++	2022-11-07 06:16:51
6	Mic Rey	350	C++	2025-08-24 10:41:34
7	Yeung Man Tsung	351	C++	2022-11-20 11:57:19
8	Armen Andreasyan	372	C++	2015-10-10 16:23:06
9	Admir Ahmespahić	375	C++	2019-03-18 22:51:59
10	Johan Wind	376	C++	2014-09-28 17:58:35

#	User	Length	Language	Date
1	David Cawthon	807	Common Lisp	2020-09-13 05:43:35

#	User	Length	Language	Date
1	Hidden user	883	F#	2021-07-05 22:31:18

#	User	Length	Language	Date
1	Krzysztof Gibuła	757	Go	2019-02-25 20:16:51
2	Hidden user	1306	Go	2018-05-03 01:31:04

#	User	Length	Language	Date
1	Fran Cruz Zamorano	290	Haskell	2017-06-28 14:02:52
2	Xee	392	Haskell	2024-02-01 09:47:46
3	Vicky Nguyen	394	Haskell	2022-05-27 08:19:59
4	Teresa Van	416	Haskell	2017-02-01 22:05:08
5	Hidden user	436	Haskell	2021-11-16 02:03:52
6	Brent Yorgey	451	Haskell	2019-10-13 04:22:46
7	Abel Martin	511	Haskell	2019-10-13 10:44:45
8	Udo Stenzel	536	Haskell	2023-04-15 16:17:32
9	Hussain Sobhy	576	Haskell	2025-05-10 21:32:07
10	Zach Tschetter	587	Haskell	2021-04-17 01:44:37

#	User	Length	Language	Date
1	Doug Goodman	501	Java	2017-08-20 16:53:34
2	Eric Leow Yu Quan	564	Java	2020-12-11 15:14:21
3	Anirudh Rahul	601	Java	2016-08-05 00:41:32
4	Simon Xue	621	Java	2015-11-18 07:25:53
5	Marcus Der	621	Java	2019-03-08 08:17:18
6	Syed AbuTalib	621	Java	2019-09-30 17:10:41
7	Felix Burie	636	Java	2021-10-09 23:54:58
8	Erlend Raa Vågset	637	Java	2018-09-12 18:51:34
9	Pedro Contipelli	640	Java	2016-07-31 07:14:42
10	Desireé af Geijerstam	647	Java	2018-06-10 23:06:18

#	User	Length	Language	Date
1	Howard Tin Chi Chan	577	JavaScript (Node.js)	2021-03-21 19:48:49
2	Aldo Luna Bueno	1101	JavaScript (Node.js)	2024-11-15 20:34:10
3	Shinno K	1789	JavaScript (Node.js)	2020-03-01 15:02:31
4	Mikael Fiala-Lundström	2049	JavaScript (Node.js)	2021-06-21 17:52:55
5	Stephanie Keck	9224	JavaScript (Node.js)	2020-01-31 23:39:07

#	User	Length	Language	Date
1	Jimmy Gustafsson	131	JavaScript (SpiderMonkey)	2024-08-27 23:56:26
2	Christian Pilegaard Cederquist	327	JavaScript (SpiderMonkey)	2023-02-05 09:06:26
3	J M	389	JavaScript (SpiderMonkey)	2016-10-26 19:46:01
4	Bjørn Chr. Soltvedt	583	JavaScript (SpiderMonkey)	2019-11-07 10:03:36
5	Magnar Myrtveit	672	JavaScript (SpiderMonkey)	2016-12-26 20:33:12
6	Nicklas Utgaard	974	JavaScript (SpiderMonkey)	2023-12-02 19:39:20
7	Hà Minh Ngọc	1166	JavaScript (SpiderMonkey)	2016-07-26 14:46:57
8	Hidden user	1166	JavaScript (SpiderMonkey)	2016-07-27 09:08:35

#	User	Length	Language	Date
1	Hidden user	392	Julia	2025-04-08 22:33:31
2	Timothy Gaede	1113	Julia	2024-07-03 04:08:15

#	User	Length	Language	Date
1	Dmitry Shostak	319	Kotlin	2019-09-23 07:15:21
2	Troy Warmboe	325	Kotlin	2020-02-05 22:29:23
3	Dayan Ruben Gonzalez	522	Kotlin	2020-09-28 23:14:10
4	Adam Rankin	770	Kotlin	2023-05-10 05:30:54
5	Neil Harmon	898	Kotlin	2019-07-26 15:43:48
6	Jacob Huebner	1334	Kotlin	2021-06-03 00:24:39
7	Silas Lenz	2465	Kotlin	2019-02-14 14:36:29

#	User	Length	Language	Date
1	Caleb Austin	473	Lua	2024-08-28 22:50:26

#	User	Length	Language	Date
1	Ingemar Ragnemalm	482	Pascal	2017-11-28 15:27:22
2	Magnus Ragnemalm	714	Pascal	2017-11-29 12:22:21

#	User	Length	Language	Date
1	陳建宏	584	PHP	2021-06-25 18:22:11
2	Silvena Lam	639	PHP	2016-06-06 16:24:13

#	User	Length	Language	Date
1	Guðni Natan Gunnarsson	182	Python 2	2017-03-22 20:11:40
2	Thomas Feld	183	Python 2	2019-08-22 10:13:24
3	Hidden user	221	Python 2	2018-01-05 08:01:09
4	Guan Yang Ze	240	Python 2	2019-08-27 09:46:39
5	Jason Yuen	252	Python 2	2017-07-06 18:48:05
6	Erik Tjøswold	258	Python 2	2018-09-12 17:45:57
7	Andreas Björklund	258	Python 2	2019-12-26 08:50:48
8	Snild Dolkow	261	Python 2	2015-10-18 13:05:57
9	Lars Tveito	264	Python 2	2015-11-17 02:41:45
10	Matthew Anderson	271	Python 2	2017-07-16 23:03:37

#	User	Length	Language	Date
1	June Hoop	103	Python 3	2025-09-21 16:25:14
2	Clement Oh	106	Python 3	2023-07-24 15:42:11
3	David Aldenbro	119	Python 3	2025-08-24 16:50:49
4	Harry Zhang	122	Python 3	2023-06-27 08:56:29
5	Benjamin Z White	124	Python 3	2023-04-23 23:29:06
6	Noah Hessen Bjerke	131	Python 3	2023-12-08 14:43:22
7	Ahmed Chamseddine	145	Python 3	2024-08-19 14:36:52
8	Casper Rysgaard	151	Python 3	2021-11-03 18:13:56
9	benoit belasco	161	Python 3	2023-07-30 01:37:07
10	a_b__c	165	Python 3	2021-03-23 11:53:03

#	User	Length	Language	Date
1	Thomas Feld	87	Ruby	2023-03-30 12:26:13
2	Alexander Bilde Pedersen	128	Ruby	2024-12-03 16:33:27
3	Hidden user	176	Ruby	2018-06-24 23:12:54
4	Erik Rydbert	204	Ruby	2016-07-20 10:22:27
5	Daniel Harder	225	Ruby	2018-09-01 02:58:10
6	Conor O'Brien	267	Ruby	2022-02-08 23:38:32
7	Macdara mac an tSionnaigh	302	Ruby	2019-10-04 18:41:04
8	Casper Christensen	390	Ruby	2016-01-24 17:12:28
9	Hugo Winbladh	442	Ruby	2017-05-15 10:12:54
10	Lasse Berglund	468	Ruby	2016-06-23 03:29:14

#	User	Length	Language	Date
1	Joe Amenta	415	Rust	2022-09-25 17:31:12
2	Vincent Lagerros	631	Rust	2025-02-17 14:33:00
3	Hidden user	776	Rust	2026-01-06 21:39:24
4	David Zacek	902	Rust	2021-09-05 18:12:01
5	Shivam Thakur	928	Rust	2019-06-28 00:00:06
6	Hidden user	931	Rust	2021-02-26 12:44:37
7	Norbert Voelker	1042	Rust	2021-06-11 01:28:52
8	Artur Khuziakhmetov	1199	Rust	2025-01-16 12:21:22
9	Eric Pinter	1208	Rust	2021-05-28 23:01:57
10	Bas Dirks	1235	Rust	2022-01-12 08:15:54

Solution running time distribution