Problem A
Join Strings — Problem Statistics

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Submissions	62214
Accepted submissions	9042
Submission ratio	14.53%
Authors	6681
Full solves [?]	5189
Full solve Ratio	77.67%

#	User	Runtime	Language	Date
1	Chen Shenghao	0.01 s	C	2023-12-24 16:41:46
2	Ioannis Br	0.02 s	C	2020-04-22 12:44:05
3	Johan Degn	0.02 s	C	2021-10-04 23:59:47
4	Richard Ewald	0.02 s	C	2023-06-27 20:15:37
5	Øyvind Almli	0.02 s	C	2023-07-24 21:53:33
6	Scott Dauer	0.04 s	C	2020-01-17 22:52:26
7	Jón Steinn Elíasson	0.04 s	C	2020-03-09 01:49:01
8	Mike Xie	0.04 s	C	2021-03-03 16:32:20
9	Mikael K Eriksson	0.04 s	C	2021-06-17 17:13:59
10	Sanket D	0.04 s	C	2022-02-17 23:57:14

#	User	Runtime	Language	Date
1	Ben-Richard Ebbesvik	0.16 s	C#	2023-12-17 15:59:36
2	marcus uppström	0.16 s	C#	2024-02-13 22:36:42
3	Piotr Karpala	0.18 s	C#	2022-01-24 23:25:47
4	Asbjørn Engås	0.19 s	C#	2023-03-22 20:26:13
5	Deci Bel	0.28 s	C#	2024-06-04 20:11:36
6	Anton Prasolov	0.36 s	C#	2023-03-17 14:28:27
7	Javier Campos	0.41 s	C#	2021-09-28 10:25:05
8	Cecilia L	0.42 s	C#	2022-05-15 17:00:04
9	Apurav Khare	0.43 s	C#	2021-09-22 00:58:27
10	Rasmus Johansson	0.43 s	C#	2022-11-22 16:44:43

#	User	Runtime	Language	Date
1	Øyvind Almli	0.01 s	C++	2023-07-24 21:21:04
2	Guk Yi Siong	0.01 s	C++	2023-09-15 19:51:18
3	Alexandre Gobeaux	0.01 s	C++	2024-09-01 00:57:43
4	Mathias Gernez	0.01 s	C++	2024-09-01 01:03:20
5	Hans Tananda	0.02 s	C++	2019-08-17 18:27:45
6	Chen Shenghao	0.02 s	C++	2019-09-27 07:07:10
7	Agis Daniels	0.02 s	C++	2019-11-28 15:22:02
8	Ben Wu	0.02 s	C++	2020-02-24 20:02:22
9	Ethan Kuai	0.02 s	C++	2020-12-20 11:15:47
10	Mads Overgård Henningsen	0.02 s	C++	2021-09-30 14:30:14

#	User	Runtime	Language	Date
1	David Cawthon	0.28 s	Common Lisp	2020-11-28 05:08:39

#	User	Runtime	Language	Date
1	Stefan Schmiedl	0.90 s	F#	2024-08-20 18:55:30

#	User	Runtime	Language	Date
1	Martin Stensgård	0.02 s	Go	2024-08-15 22:29:52
2	Adam Engsig	0.06 s	Go	2023-05-11 11:21:00
3	Alvaro Camilo Torres Rodriguez	0.13 s	Go	2024-12-16 04:34:50
4	Norbert Voelker	0.17 s	Go	2021-03-28 19:22:50
5	Péter Szakszon	0.17 s	Go	2021-12-09 08:39:55
6	Krzysztof Gibuła	0.21 s	Go	2021-03-20 22:20:27
7	Thomas	0.32 s	Go	2024-01-03 05:09:36
8	Ole Johan Walderhaug	0.41 s	Go	2021-08-20 22:25:09

#	User	Runtime	Language	Date
1	Joash Chin Synn Khee	0.07 s	Haskell	2019-08-06 16:54:46
2	Casper Beckman	0.15 s	Haskell	2024-07-10 17:01:14
3	Zach Tschetter	0.22 s	Haskell	2021-05-02 18:59:11
4	Øyvind Almli	0.30 s	Haskell	2023-07-12 18:21:10
5	Anders B. Clausen	0.47 s	Haskell	2021-10-05 01:35:11

#	User	Runtime	Language	Date
1	Clement Oh	0.10 s	Java	2022-08-15 12:35:27
2	Sven Rönnbäck	0.12 s	Java	2022-04-10 08:05:46
3	Guk Yi Siong	0.15 s	Java	2023-09-25 11:48:23
4	Isaac Tay Zhi Xian	0.18 s	Java	2022-07-18 10:50:49
5	Chen Shenghao	0.19 s	Java	2019-09-27 06:09:39
6	Elaine Huang	0.21 s	Java	2024-08-30 06:37:32
7	Leon Wang	0.21 s	Java	2024-08-31 23:23:12
8	Leon Tham	0.22 s	Java	2019-09-21 11:17:33
9	Darko Aleksic	0.23 s	Java	2020-03-21 09:46:54
10	Junpei Ma	0.23 s	Java	2021-02-26 03:33:30

#	User	Runtime	Language	Date
1	Ralf Leistad	0.18 s	JavaScript (Node.js)	2019-05-04 06:40:46
2	Sander Hellesø	0.19 s	JavaScript (Node.js)	2019-05-03 09:17:44
3	Antti Ellilä	0.26 s	JavaScript (Node.js)	2023-02-04 01:11:51
4	tannal	0.28 s	JavaScript (Node.js)	2025-06-14 00:04:52
5	Juan Jose jmartinv	0.31 s	JavaScript (Node.js)	2025-01-12 05:25:29
6	Nicolas Alexander Herrera Rincon	0.31 s	JavaScript (Node.js)	2025-01-17 13:42:48
7	Jonto Steen	0.32 s	JavaScript (Node.js)	2023-04-25 22:18:54
8	Wee Jong Cheong	0.71 s	JavaScript (Node.js)	2021-06-17 17:22:31
9	Howard Tin Chi Chan	0.73 s	JavaScript (Node.js)	2022-01-11 11:00:44
10	Hanna Abrahamsson	0.75 s	JavaScript (Node.js)	2022-01-22 12:55:37

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.14 s	JavaScript (SpiderMonkey)	2019-08-01 14:28:12
2	Christian Pilegaard Cederquist	0.15 s	JavaScript (SpiderMonkey)	2023-02-09 15:55:38
3	Simon Titkó	0.15 s	JavaScript (SpiderMonkey)	2024-02-23 16:59:03

#	User	Runtime	Language	Date
1	Hidden user	0.52 s	Julia	2025-03-09 12:40:48

#	User	Runtime	Language	Date
1	Hidden user	0.58 s	Kotlin	2019-07-14 11:35:54
2	Johnny Baloney	0.61 s	Kotlin	2022-01-10 14:56:32
3	Hidden user	0.65 s	Kotlin	2020-03-07 01:56:14
4	Adam Rankin	0.89 s	Kotlin	2023-09-14 18:56:06
5	Adam Koprowski	0.91 s	Kotlin	2020-08-25 23:34:36
6	Emil Wihlander	0.92 s	Kotlin	2023-05-07 21:28:05
7	Thanh Le	0.93 s	Kotlin	2021-07-28 16:31:23

#	User	Runtime	Language	Date
1	Caleb Austin	0.25 s	Lua	2024-09-08 04:03:29

#	User	Runtime	Language	Date
1	Ishpreet Singh Bhasin	0.09 s	OCaml	2026-01-02 18:09:31

#	User	Runtime	Language	Date
1	Joseph Chau	0.08 s	Pascal	2024-01-30 20:28:41

#	User	Runtime	Language	Date
1	Andreas Björklund	0.11 s	Python 2	2019-10-10 18:38:08
2	Yanmarshus Bachtiar	0.15 s	Python 2	2020-10-22 15:49:02
3	Fredrik Horn Dannert	0.17 s	Python 2	2021-01-10 22:21:44
4	Hidden user	0.18 s	Python 2	2019-07-10 20:48:53
5	Sigurður Jens Albertsson	0.19 s	Python 2	2021-02-23 14:15:34
6	Nishka Awasthi	0.20 s	Python 2	2022-09-07 05:49:18

#	User	Runtime	Language	Date
1	d1strikt	0.09 s	Python 3	2025-05-06 00:28:35
2	Diana Kuntsmann	0.09 s	Python 3	2025-05-21 15:58:45
3	Avery	0.09 s	Python 3	2025-07-18 05:51:50
4	TANG QIANTING	0.09 s	Python 3	2026-02-25 20:49:14
5	Nan Xiao	0.09 s	Python 3	2026-02-28 06:54:11
6	Ma Rundi	0.09 s	Python 3	2026-03-01 08:51:50
7	CHANG KAI-JIE	0.09 s	Python 3	2026-03-02 09:33:57
8	GAO QI	0.09 s	Python 3	2026-03-03 09:31:00
9	Hidden user	0.09 s	Python 3	2026-03-03 19:06:57
10	Pengxiang Xia	0.09 s	Python 3	2026-03-04 08:13:32

#	User	Runtime	Language	Date
1	Hidden user	0.21 s	Ruby	2019-05-30 16:50:05
2	Thomas Feld	0.28 s	Ruby	2023-02-16 13:20:57

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2024-05-30 00:47:57
2	Lasse Møldrup	0.02 s	Rust	2021-09-30 11:25:39
3	Christofer Nolander	0.03 s	Rust	2019-10-20 23:32:44
4	Frederic Sauve-Hoover	0.03 s	Rust	2022-01-19 20:23:03
5	Artur Khuziakhmetov	0.03 s	Rust	2022-07-11 09:58:56
6	Morten Lohne	0.03 s	Rust	2024-07-25 17:58:46
7	Jakub Jagiello	0.04 s	Rust	2020-01-20 12:50:45
8	Klas af Geijerstam	0.04 s	Rust	2020-01-20 13:40:18
9	Budi Syahiddin	0.04 s	Rust	2020-09-14 10:11:39
10	Pahlevi Fikri Auliya	0.04 s	Rust	2020-10-11 11:37:34

#	User	Runtime	Language	Date
1	Joe Blower	0.02 s	Zig	2025-05-19 03:34:19

#	User	Length	Language	Date
1	Mikael K Eriksson	595	C	2021-06-17 17:40:36
2	Zachariah Goldthorpe	814	C	2019-11-10 18:15:34
3	Karthik Balaji	1024	C	2023-08-28 01:52:28
4	Chen Shenghao	1035	C	2019-09-28 08:07:58
5	Mario Farag	1052	C	2022-07-28 11:12:58
6	Oscar Kamf	1065	C	2022-08-13 23:30:06
7	Jón Steinn Elíasson	1111	C	2020-03-09 01:49:01
8	Rahaf Al Saeed	1117	C	2024-05-24 11:38:21
9	Tomas Nicolas Jerez Garcia	1125	C	2025-01-15 02:50:16
10	Mateo Gabriel Gonzalez Lara	1125	C	2025-01-15 04:13:25

#	User	Length	Language	Date
1	Javier Campos	925	C#	2021-09-28 10:25:05
2	Asbjørn Engås	1073	C#	2023-03-22 21:35:44
3	Anton Prasolov	1287	C#	2023-03-17 14:28:27
4	Cecilia L	1744	C#	2022-05-15 17:35:27
5	Apurav Khare	1762	C#	2021-09-22 00:58:27
6	marcus uppström	1823	C#	2026-02-22 01:47:32
7	Rasmus Johansson	2345	C#	2022-11-22 16:44:43
8	Ben-Richard Ebbesvik	3990	C#	2023-12-17 15:59:36
9	Deci Bel	4166	C#	2024-06-04 20:11:36
10	Piotr Karpala	8879	C#	2022-01-24 23:25:47

#	User	Length	Language	Date
1	Michael Wu	199	C++	2024-08-24 04:11:17
2	Ernest Ng Zi Xuan	209	C++	2023-05-27 13:58:18
3	Mathias Gernez	238	C++	2024-08-31 00:07:14
4	Joshua Lass	240	C++	2025-01-25 00:11:50
5	Guk Yi Siong	277	C++	2024-01-07 18:06:11
6	Kok Seng Chiew	368	C++	2019-04-24 16:09:44
7	Anna Roczek	377	C++	2023-07-22 12:00:48
8	Yeung Man Tsung	390	C++	2022-07-18 14:51:42
9	a_b__c	391	C++	2021-02-23 19:33:52
10	14-Phạm Cao Gia Khang- 10A9	396	C++	2022-08-09 15:31:11

#	User	Length	Language	Date
1	David Cawthon	1163	Common Lisp	2020-11-28 05:08:39

#	User	Length	Language	Date
1	Stefan Schmiedl	1179	F#	2024-08-20 18:55:30

#	User	Length	Language	Date
1	Krzysztof Gibuła	1046	Go	2021-03-20 22:20:27
2	Ole Johan Walderhaug	1092	Go	2021-08-20 22:25:09
3	Martin Stensgård	1127	Go	2024-08-15 22:29:52
4	Thomas	1179	Go	2024-01-03 05:09:36
5	Norbert Voelker	1304	Go	2021-03-28 19:19:32
6	Alvaro Camilo Torres Rodriguez	1443	Go	2024-12-16 04:34:50
7	Péter Szakszon	3058	Go	2021-12-09 08:39:55
8	Adam Engsig	5006	Go	2021-04-22 15:23:23

#	User	Length	Language	Date
1	Øyvind Almli	935	Haskell	2022-08-01 15:54:37
2	Zach Tschetter	986	Haskell	2021-05-02 19:02:38
3	Joash Chin Synn Khee	1496	Haskell	2019-08-06 16:54:46
4	Casper Beckman	1942	Haskell	2024-07-10 17:01:14
5	Anders B. Clausen	2408	Haskell	2021-10-05 01:35:11

#	User	Length	Language	Date
1	Lew Choon Hean	693	Java	2024-09-24 18:14:36
2	Tan Yi Long	755	Java	2024-09-11 15:44:49
3	Ninghui Li	794	Java	2022-08-30 01:58:10
4	Bryan Wang Peng Jun	810	Java	2020-09-15 05:06:22
5	Miorel Palii	853	Java	2022-02-28 07:39:44
6	Kaung Htet Wai Yan	890	Java	2023-05-28 10:02:31
7	Shielda Kamilia Hidajat	893	Java	2023-10-04 03:20:42
8	Li Haotian	954	Java	2020-03-02 17:33:44
9	glee	973	Java	2019-09-18 20:04:00
10	Hidden user	983	Java	2019-07-14 15:18:48

#	User	Length	Language	Date
1	Antti Ellilä	319	JavaScript (Node.js)	2023-02-04 01:11:51
2	Jonto Steen	759	JavaScript (Node.js)	2023-04-25 22:18:54
3	Howard Tin Chi Chan	813	JavaScript (Node.js)	2022-01-11 11:00:44
4	Ralf Leistad	852	JavaScript (Node.js)	2019-05-04 06:40:46
5	Sander Hellesø	873	JavaScript (Node.js)	2019-05-03 09:17:44
6	tannal	939	JavaScript (Node.js)	2025-06-14 00:04:52
7	Juan Jose jmartinv	1090	JavaScript (Node.js)	2025-01-12 05:25:29
8	Nicolas Alexander Herrera Rincon	1090	JavaScript (Node.js)	2025-01-17 13:42:48
9	Hanna Abrahamsson	1233	JavaScript (Node.js)	2022-01-22 12:55:37
10	Wee Jong Cheong	2060	JavaScript (Node.js)	2021-06-17 17:22:31

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	105	JavaScript (SpiderMonkey)	2024-01-06 21:45:38
2	Bjørn Chr. Soltvedt	241	JavaScript (SpiderMonkey)	2019-08-01 14:28:12
3	Simon Titkó	309	JavaScript (SpiderMonkey)	2024-02-23 16:59:03

#	User	Length	Language	Date
1	Hidden user	592	Julia	2025-03-09 12:40:48

#	User	Length	Language	Date
1	Adam Rankin	973	Kotlin	2023-09-14 18:56:06
2	Emil Wihlander	1001	Kotlin	2023-05-07 21:28:05
3	Adam Koprowski	1014	Kotlin	2020-08-24 18:54:28
4	Johnny Baloney	1371	Kotlin	2022-01-10 14:48:35
5	Hidden user	1673	Kotlin	2019-07-14 11:20:08
6	Hidden user	1968	Kotlin	2020-03-07 01:56:14
7	Thanh Le	2980	Kotlin	2021-07-28 16:39:55

#	User	Length	Language	Date
1	Caleb Austin	605	Lua	2024-09-08 04:03:29

#	User	Length	Language	Date
1	Ishpreet Singh Bhasin	770	OCaml	2026-01-03 06:29:46

#	User	Length	Language	Date
1	Joseph Chau	1120	Pascal	2024-01-30 20:28:41

#	User	Length	Language	Date
1	Andreas Björklund	376	Python 2	2019-10-10 18:38:08
2	Hidden user	456	Python 2	2019-07-10 20:48:53
3	Sigurður Jens Albertsson	514	Python 2	2021-02-23 14:15:34
4	Fredrik Horn Dannert	565	Python 2	2021-01-10 22:21:44
5	Yanmarshus Bachtiar	670	Python 2	2020-10-22 15:49:02
6	Nishka Awasthi	1822	Python 2	2022-09-07 05:49:18

#	User	Length	Language	Date
1	Avery	159	Python 3	2025-07-18 05:36:44
2	Wilbert	167	Python 3	2026-01-16 20:37:03
3	Tianyu Zhang	168	Python 3	2025-01-15 11:21:13
4	Pedro Sugiyama	200	Python 3	2024-08-30 05:54:57
5	Isaac Tay Zhi Xian	221	Python 3	2024-02-23 10:42:21
6	Ahmed Chamseddine	233	Python 3	2024-06-14 21:26:39
7	Thomas Feld	235	Python 3	2023-02-16 12:54:10
8	Thibault Raffaillac	251	Python 3	2020-02-21 11:37:27
9	Charles Chen	254	Python 3	2024-08-28 03:18:55
10	Michael Wu	260	Python 3	2024-08-24 02:53:52

#	User	Length	Language	Date
1	Thomas Feld	104	Ruby	2023-02-16 14:22:50
2	Hidden user	275	Ruby	2019-05-30 16:50:05

#	User	Length	Language	Date
1	Artur Khuziakhmetov	702	Rust	2022-07-11 10:00:41
2	David Rasch	786	Rust	2023-10-25 10:35:45
3	Mikail Khan	872	Rust	2022-01-14 02:28:42
4	Jakub Jagiello	913	Rust	2020-01-20 13:31:13
5	Adrien Coulier	1008	Rust	2020-04-15 16:34:41
6	Morten Lohne	1019	Rust	2024-07-25 17:55:24
7	Lasse Møldrup	1042	Rust	2021-09-30 11:56:03
8	Øyvind Almli	1061	Rust	2023-07-12 19:27:43
9	Sawa	1196	Rust	2021-02-20 02:51:34
10	Klas af Geijerstam	1218	Rust	2020-01-20 13:40:18

#	User	Length	Language	Date
1	Joe Blower	1579	Zig	2025-05-19 03:34:19

Solution running time distribution