Problem A
Adjoin the Networks — Problem Statistics

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Submissions	3882
Accepted submissions	920
Submission ratio	23.70%
Authors	854
Full solves [?]	650
Full solve Ratio	76.11%

#	User	Runtime	Language	Date
1	Johan Westerlund	0.02 s	C	2015-10-12 08:33:27
2	Andreas Björklund	0.02 s	C	2018-12-06 16:01:54
3	Ivan Petrov	0.02 s	C	2019-07-03 13:10:15
4	Gunnar Kreitz	0.03 s	C	2015-10-10 08:23:20
5	Mirel Cosulschi	0.68 s	C	2023-11-13 21:46:51

#	User	Runtime	Language	Date
1	Nicolai	0.18 s	C#	2025-11-18 10:41:53
2	Lukas Polacek	0.21 s	C#	2016-11-19 16:57:12
3	Hidden user	0.39 s	C#	2017-10-06 20:59:36

#	User	Runtime	Language	Date
1	Johan Westerlund	0.00 s	C++	2015-10-12 09:04:10
2	Jim Zheng	0.01 s	C++	2020-01-21 16:12:36
3	Neal Zane	0.02 s	C++	2015-11-30 06:47:34
4	Sergio Vieri	0.02 s	C++	2018-01-31 05:26:36
5	Brandon Zhang	0.02 s	C++	2019-05-07 21:54:29
6	SiBi	0.02 s	C++	2019-06-08 14:30:58
7	Kaiqi Yan	0.02 s	C++	2021-05-21 01:22:38
8	爱于 柳	0.02 s	C++	2025-07-29 00:48:55
9	Muhammad Rais Fathin Mudzakir	0.03 s	C++	2016-05-21 10:11:48
10	Hidden user	0.03 s	C++	2016-10-06 14:13:47

#	User	Runtime	Language	Date
1	Frank Staals	0.33 s	Haskell	2015-10-11 18:30:23
2	Jonatan Nilsson	1.44 s	Haskell	2019-04-12 09:00:40

#	User	Runtime	Language	Date
1	Josenildo Silva	0.16 s	Java	2017-07-07 21:04:26
2	William Fiset	0.19 s	Java	2017-04-03 15:08:54
3	Bjørn Dons	0.28 s	Java	2019-06-08 18:35:06
4	Samuel Klingström	0.31 s	Java	2019-08-19 11:03:33
5	Rene Argento	0.35 s	Java	2024-07-21 19:43:05
6	Sumeet Varma	0.36 s	Java	2015-10-10 10:29:26
7	Sam Reinehr	0.37 s	Java	2018-10-15 02:28:56
8	Doug Goodman	0.37 s	Java	2018-12-14 16:20:55
9	Martijn Muijsers	0.38 s	Java	2016-10-30 18:59:20
10	Anders Hagward	0.39 s	Java	2015-10-31 20:15:15

#	User	Runtime	Language	Date
1	Frederik Højholt	0.38 s	JavaScript (SpiderMonkey)	2015-10-18 07:55:07
2	Christian Pilegaard Cederquist	0.67 s	JavaScript (SpiderMonkey)	2023-08-16 19:01:16

#	User	Runtime	Language	Date
1	Hidden user	0.53 s	Kotlin	2020-03-02 03:14:56

#	User	Runtime	Language	Date
1	Sigurður Jens Albertsson	0.09 s	Python 2	2017-11-13 22:15:55
2	Maj Stenmark	0.18 s	Python 2	2018-08-05 16:32:43
3	Øyvind Haarberg	0.18 s	Python 2	2018-08-28 17:51:47
4	Jesper Öqvist	0.19 s	Python 2	2018-10-05 19:17:09
5	Matias Frank Jensen	0.20 s	Python 2	2018-10-11 17:24:16
6	Muhammad Rais Fathin Mudzakir	0.21 s	Python 2	2016-05-21 12:31:32
7	Stian Jensen	0.22 s	Python 2	2015-10-10 17:19:06
8	Urban Pettersson	0.22 s	Python 2	2016-02-15 17:21:14
9	Yan Kalchevsky	0.23 s	Python 2	2016-12-25 19:54:37
10	Robert Welin-Berger	0.24 s	Python 2	2016-06-30 15:05:13

#	User	Runtime	Language	Date
1	M4 Myat Maung	0.17 s	Python 3	2025-03-15 20:21:56
2	Haoming Lin	0.18 s	Python 3	2022-02-17 19:49:08
3	MARAKA HANSIKA MARAKA HANSIKA	0.18 s	Python 3	2025-05-14 13:47:33
4	Nicholas Russell Saerang	0.20 s	Python 3	2023-03-27 09:39:49
5	gnaneswari lolugu	0.20 s	Python 3	2024-02-11 02:54:42
6	Måns Magnusson	0.21 s	Python 3	2023-02-15 19:17:11
7	Priyanshu Sethi	0.21 s	Python 3	2024-01-01 21:05:42
8	Alvaro Gamboa Rosillo	0.21 s	Python 3	2025-11-18 19:33:33
9	oscar llain	0.22 s	Python 3	2024-03-16 02:31:23
10	Mayuri Birari	0.22 s	Python 3	2024-04-06 00:16:48

#	User	Runtime	Language	Date
1	Casper Christensen	0.29 s	Ruby	2016-03-28 18:28:18
2	Thomas Feld	0.41 s	Ruby	2023-10-23 12:57:02

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2025-03-04 12:39:39
2	Elias Nodland	0.03 s	Rust	2023-02-26 12:58:23
3	Daniel Anker Hermansen	0.04 s	Rust	2023-10-02 20:04:01
4	Niklas Sandén	0.05 s	Rust	2023-02-15 21:25:23
5	Hidden user	0.25 s	Rust	2025-06-24 17:25:10
6	Ole Johan Walderhaug	0.31 s	Rust	2021-07-15 21:57:41

#	User	Length	Language	Date
1	Gunnar Kreitz	1218	C	2015-10-10 08:23:20
2	Ivan Petrov	1330	C	2019-07-03 13:10:15
3	Johan Westerlund	1401	C	2015-10-12 08:33:27
4	Andreas Björklund	2061	C	2018-12-06 16:01:54
5	Mirel Cosulschi	2504	C	2023-11-13 21:46:51

#	User	Length	Language	Date
1	Lukas Polacek	2135	C#	2016-11-19 16:57:12
2	Nicolai	2375	C#	2025-11-18 10:41:53
3	Hidden user	4363	C#	2017-10-06 20:59:36

#	User	Length	Language	Date
1	Johan Westerlund	481	C++	2015-10-12 09:10:35
2	oy9r	616	C++	2024-03-31 06:57:08
3	Jón Atli Guðmundsson	681	C++	2024-10-12 00:32:27
4	Elias Lolck	824	C++	2023-08-16 22:40:01
5	Jannik Olbrich	841	C++	2019-06-27 08:10:03
6	William Gan	864	C++	2017-08-13 03:28:30
7	Antoni Guz	868	C++	2018-10-21 20:30:47
8	Jeffrey Lee	904	C++	2016-12-06 03:58:24
9	Mehrab Hossain	915	C++	2021-03-08 05:20:31
10	Gerth Stølting Brodal	928	C++	2015-10-11 14:28:29

#	User	Length	Language	Date
1	Frank Staals	1594	Haskell	2015-10-11 17:57:36
2	Jonatan Nilsson	1710	Haskell	2019-04-12 09:00:40

#	User	Length	Language	Date
1	Jonas Sjöstrand	1606	Java	2015-10-12 00:24:41
2	Hidden user	1781	Java	2015-11-12 05:03:43
3	Meet Shah	1853	Java	2021-12-09 04:39:00
4	Josenildo Silva	1882	Java	2017-07-07 21:04:26
5	Joshua Linge	1895	Java	2015-10-10 11:42:08
6	Snild Dolkow	1924	Java	2015-10-10 20:37:44
7	Doug Goodman	2009	Java	2018-12-14 16:20:55
8	Martin Jakobsson	2108	Java	2017-09-08 15:12:00
9	Sam Reinehr	2267	Java	2018-10-15 02:28:56
10	Frank Ruskey	2325	Java	2017-12-04 22:51:43

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	2715	JavaScript (SpiderMonkey)	2023-08-16 19:01:16
2	Frederik Højholt	2861	JavaScript (SpiderMonkey)	2015-10-18 07:55:07

#	User	Length	Language	Date
1	Hidden user	2140	Kotlin	2020-03-02 03:14:56

#	User	Length	Language	Date
1	Urban Pettersson	873	Python 2	2016-02-15 17:21:14
2	Yan Kalchevsky	1073	Python 2	2016-12-25 19:54:37
3	Hidden user	1121	Python 2	2016-07-23 16:37:16
4	Muhammad Rais Fathin Mudzakir	1206	Python 2	2016-05-21 12:31:32
5	Jesper Öqvist	1332	Python 2	2018-10-05 19:17:09
6	Maj Stenmark	1403	Python 2	2018-08-05 16:32:43
7	Lars Åström	1414	Python 2	2018-11-29 18:11:47
8	Matias Frank Jensen	1518	Python 2	2018-10-11 17:24:16
9	Frederik Højholt	1621	Python 2	2015-10-18 07:57:50
10	Robert Welin-Berger	1760	Python 2	2016-06-30 15:05:13

#	User	Length	Language	Date
1	Shashank Bhatt	646	Python 3	2023-02-08 06:54:17
2	Josh Taylor	822	Python 3	2023-09-18 23:00:26
3	Alvaro Gamboa Rosillo	838	Python 3	2025-11-18 19:33:33
4	Aman Swar	846	Python 3	2024-01-17 09:17:57
5	Kaustubh Krishna	847	Python 3	2023-12-22 07:39:58
6	Nicholas Russell Saerang	872	Python 3	2023-03-27 19:23:15
7	Priyanshu Sethi	872	Python 3	2024-01-01 21:05:42
8	gnaneswari lolugu	872	Python 3	2024-02-11 02:54:42
9	oscar llain	872	Python 3	2024-03-16 02:31:23
10	Mayuri Birari	872	Python 3	2024-04-06 00:16:48

#	User	Length	Language	Date
1	Thomas Feld	282	Ruby	2023-10-23 13:04:49
2	Casper Christensen	1008	Ruby	2016-03-28 18:28:18

#	User	Length	Language	Date
1	Elias Nodland	1895	Rust	2023-02-26 13:16:39
2	Ole Johan Walderhaug	3648	Rust	2021-07-15 21:57:41
3	Vincent Lagerros	6466	Rust	2024-08-10 16:38:17
4	Hidden user	17335	Rust	2025-06-24 17:25:10
5	Niklas Sandén	27149	Rust	2023-02-15 21:25:23
6	Daniel Anker Hermansen	28194	Rust	2023-10-02 20:04:01

Solution running time distribution