Problem A
Bridges and Tunnels — Problem Statistics

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Submissions	4953
Accepted submissions	1807
Submission ratio	36.48%
Authors	1231
Full solves [?]	1111
Full solve Ratio	90.25%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.11 s	C	2020-10-07 19:53:53
2	Mirel Cosulschi	0.13 s	C	2022-11-05 20:56:54
3	Jacob Sutton	0.15 s	C	2021-04-30 22:15:20
4	Berrig	0.48 s	C	2022-02-15 13:27:52

#	User	Runtime	Language	Date
1	Andrei Cosovan	0.15 s	C#	2026-02-07 15:14:08
2	Hidden user	0.52 s	C#	2026-02-02 15:35:48
3	Hidden user	0.52 s	C#	2026-02-03 10:54:41
4	Luis fernando Mercado rodrigues	0.54 s	C#	2024-08-29 17:36:39
5	Robin Rausch	0.61 s	C#	2026-03-03 17:34:15
6	Adrian Bay Dorph	0.62 s	C#	2022-02-11 16:48:01
7	Kristoffer Højelse	0.66 s	C#	2022-02-11 18:21:11
8	Nathan Andrews	0.70 s	C#	2024-09-11 03:18:48
9	Apurav Khare	0.84 s	C#	2021-11-26 18:45:55

#	User	Runtime	Language	Date
1	Øyvind Almli	0.02 s	C++	2023-07-12 13:34:16
2	Agis Daniels	0.04 s	C++	2021-12-10 15:19:04
3	Fan Wenzhen	0.06 s	C++	2026-01-20 10:18:46
4	WFY	0.06 s	C++	2026-01-26 08:23:30
5	Hidden user	0.07 s	C++	2020-10-10 11:54:02
6	Frank Endriss	0.07 s	C++	2020-12-04 20:58:39
7	Hidden user	0.07 s	C++	2021-01-23 14:25:20
8	Amar Topalovic	0.07 s	C++	2021-02-19 23:41:26
9	Grae Yeandle	0.07 s	C++	2021-02-27 19:42:15
10	Hussein Taher	0.07 s	C++	2021-08-02 18:09:21

#	User	Runtime	Language	Date
1	Adrian Borup	1.43 s	F#	2022-02-11 20:58:00
2	Joachim Borup	1.44 s	F#	2022-02-11 21:43:48

#	User	Runtime	Language	Date
1	Nathan Lee	0.22 s	Go	2025-09-17 04:15:27
2	Norbert Voelker	0.46 s	Go	2021-11-28 23:42:40
3	Erlend Fonnes	0.63 s	Go	2021-02-20 18:26:57

#	User	Runtime	Language	Date
1	Brent Yorgey	0.82 s	Haskell	2024-10-26 00:18:40

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.12 s	Java	2023-05-19 21:32:41
2	Asmus Tørsleff	0.29 s	Java	2022-02-11 16:43:14
3	Bjørn Dons	0.30 s	Java	2022-05-09 20:56:04
4	Joachim Borup	0.32 s	Java	2021-02-22 21:17:41
5	Andrew Polizzotto	0.34 s	Java	2020-10-27 03:29:57
6	Øyvind Almli	0.35 s	Java	2022-02-08 13:02:48
7	Issa Issack	0.36 s	Java	2024-07-17 06:39:19
8	Hidden user	0.37 s	Java	2021-07-18 14:43:59
9	Hidden user	0.37 s	Java	2025-02-09 10:23:51
10	Simen Carstensen	0.38 s	Java	2021-02-22 20:11:14

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.39 s	JavaScript (SpiderMonkey)	2023-07-24 02:21:35
2	Bjørn Chr. Soltvedt	0.53 s	JavaScript (SpiderMonkey)	2020-10-19 21:55:12
3	Zach Tschetter	0.62 s	JavaScript (SpiderMonkey)	2024-11-18 20:37:16

#	User	Runtime	Language	Date
1	Chelsea Hoernemann	0.58 s	Kotlin	2022-11-16 03:53:22
2	Morten Bergmann	1.35 s	Kotlin	2021-02-28 01:10:58

#	User	Runtime	Language	Date
1	Hidden user	0.62 s	Lua	2026-01-26 15:26:30

#	User	Runtime	Language	Date
1	crapcode	0.33 s	PHP	2022-06-06 19:09:59

#	User	Runtime	Language	Date
1	gulinazha	0.21 s	Python 3	2026-03-16 09:01:31
2	Wouter Dijkstra	0.22 s	Python 3	2022-06-24 20:45:36
3	Hidden user	0.22 s	Python 3	2026-02-06 17:28:51
4	Hidden user	0.22 s	Python 3	2026-02-13 12:32:19
5	Jordan Whalen	0.23 s	Python 3	2022-10-13 20:53:06
6	Dominic Berzin Chua Way Gin	0.23 s	Python 3	2025-04-18 06:38:33
7	Maj Stenmark	0.24 s	Python 3	2022-01-17 20:32:49
8	Yi-Min Seah	0.24 s	Python 3	2022-01-29 02:31:23
9	Leo Nyberg	0.24 s	Python 3	2026-02-27 13:30:47
10	Javier Lim	0.25 s	Python 3	2026-01-26 07:15:16

#	User	Runtime	Language	Date
1	Joseph Chau	0.41 s	Ruby	2024-02-10 22:00:23
2	Thomas Feld	0.77 s	Ruby	2025-10-03 10:15:15

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.02 s	Rust	2025-03-10 14:30:03
2	Klas af Geijerstam	0.04 s	Rust	2020-11-01 13:59:56
3	Artur Khuziakhmetov	0.05 s	Rust	2025-11-17 10:15:09
4	Hidden user	0.07 s	Rust	2025-01-29 21:46:45
5	Alice Ryhl	0.14 s	Rust	2022-06-17 16:59:07
6	Erik Magnusson	0.17 s	Rust	2024-12-10 23:55:42
7	C3Speedrun2024	0.17 s	Rust	2024-12-10 23:55:53
8	Ng Tek In	0.19 s	Rust	2022-09-19 19:09:56
9	Daniel Liland	0.20 s	Rust	2023-02-24 14:58:13
10	Hidden user	0.20 s	Rust	2025-10-11 16:04:38

#	User	Length	Language	Date
1	Berrig	1387	C	2022-03-24 11:32:23
2	Mirel Cosulschi	1728	C	2022-11-05 20:56:54
3	Bergur Snorrason	3032	C	2020-10-07 19:53:53
4	Jacob Sutton	3257	C	2021-04-30 22:16:54

#	User	Length	Language	Date
1	Robin Rausch	928	C#	2026-03-03 17:34:15
2	Hidden user	1027	C#	2026-02-02 15:35:48
3	Hidden user	1027	C#	2026-02-03 10:54:41
4	Kristoffer Højelse	2035	C#	2022-02-11 18:21:11
5	Andrei Cosovan	2248	C#	2026-02-07 15:14:08
6	Luis fernando Mercado rodrigues	2284	C#	2024-08-29 17:36:39
7	Apurav Khare	2830	C#	2021-11-26 18:45:55
8	Nathan Andrews	2880	C#	2024-09-11 03:18:48
9	Adrian Bay Dorph	4936	C#	2022-02-11 16:48:01

#	User	Length	Language	Date
1	Sebastian Falk	217	C++	2024-04-16 08:17:44
2	Frederik Vase	218	C++	2024-04-16 10:25:04
3	Daniel Rasmussen	300	C++	2024-04-14 11:30:38
4	Adil Rasiyani	497	C++	2023-02-12 18:14:05
5	Elias Lolck	532	C++	2022-02-11 16:26:45
6	Si Jie Tan	534	C++	2026-01-19 14:32:15
7	Heng Hau Ye	540	C++	2026-01-19 16:13:59
8	Rumbin Lee	581	C++	2024-04-14 09:13:23
9	Alexander Skidanov	582	C++	2024-10-29 16:04:44
10	Dmitry Lyubshin	607	C++	2023-03-28 07:01:25

#	User	Length	Language	Date
1	Adrian Borup	3396	F#	2022-02-11 21:05:23
2	Joachim Borup	3396	F#	2022-02-11 21:43:48

#	User	Length	Language	Date
1	Erlend Fonnes	1332	Go	2021-02-20 18:26:57
2	Nathan Lee	1702	Go	2025-09-17 04:15:27
3	Norbert Voelker	1800	Go	2021-11-28 23:46:33

#	User	Length	Language	Date
1	Brent Yorgey	9452	Haskell	2024-10-26 00:18:40

#	User	Length	Language	Date
1	Sujay Vadlakonda	1093	Java	2021-09-11 01:18:41
2	Issa Issack	1126	Java	2024-07-17 06:39:19
3	Frederick Pek	1242	Java	2021-03-27 15:20:01
4	Crystal Sharpe	1264	Java	2020-10-03 21:19:13
5	Tan Jia Hang	1425	Java	2022-03-10 10:41:50
6	Eric Leow Yu Quan	1457	Java	2021-03-30 16:52:41
7	Paola Rodriguez	1458	Java	2026-01-31 22:27:06
8	Brady Hahn	1462	Java	2023-03-02 18:51:31
9	Hidden user	1464	Java	2025-02-04 16:38:24
10	William Skou Heidemann	1508	Java	2022-02-11 17:45:08

#	User	Length	Language	Date
1	Zach Tschetter	520	JavaScript (SpiderMonkey)	2024-11-15 17:09:05
2	Christian Pilegaard Cederquist	1160	JavaScript (SpiderMonkey)	2023-07-24 02:21:35
3	Bjørn Chr. Soltvedt	2389	JavaScript (SpiderMonkey)	2020-10-19 21:55:49

#	User	Length	Language	Date
1	Morten Bergmann	2511	Kotlin	2021-02-28 01:10:58
2	Chelsea Hoernemann	3159	Kotlin	2022-11-16 03:53:22

#	User	Length	Language	Date
1	Hidden user	2193	Lua	2026-01-26 15:26:30

#	User	Length	Language	Date
1	crapcode	891	PHP	2022-06-06 19:09:59

#	User	Length	Language	Date
1	Noah Hessen Bjerke	259	Python 3	2025-11-12 02:07:17
2	Charles Ancheta	346	Python 3	2023-04-13 09:19:28
3	Peter Stauder	389	Python 3	2023-03-11 22:46:34
4	Guk Yi Siong	485	Python 3	2024-12-01 19:09:09
5	Ahmed Chamseddine	506	Python 3	2024-12-24 21:06:43
6	Casper Rysgaard	512	Python 3	2022-02-11 16:08:56
7	Andreas Björklund	512	Python 3	2023-02-28 19:04:22
8	Simon Rumle Tarnow	513	Python 3	2022-06-17 17:09:52
9	Oskar Haarklou Veileborg	519	Python 3	2020-12-07 22:14:14
10	Troels Bjerre Lund	521	Python 3	2020-09-24 22:34:17

#	User	Length	Language	Date
1	Thomas Feld	119	Ruby	2025-10-03 10:15:15
2	Joseph Chau	1672	Ruby	2024-02-10 22:00:23

#	User	Length	Language	Date
1	Daniel Liland	1349	Rust	2023-02-24 14:58:13
2	Ng Tek In	1398	Rust	2022-09-19 19:09:56
3	Rolf Martin Glomsrud	1701	Rust	2023-02-28 21:31:56
4	Otakar Hirs	1721	Rust	2023-02-28 18:44:23
5	Alice Ryhl	1742	Rust	2022-02-11 17:09:15
6	Hidden user	1929	Rust	2025-01-29 01:48:34
7	Bas Dirks	1940	Rust	2022-06-08 18:43:46
8	Hidden user	2221	Rust	2025-01-01 01:04:43
9	Mckinley Xie	2280	Rust	2025-02-05 01:37:44
10	Artur Khuziakhmetov	2528	Rust	2025-11-17 10:15:09

Solution running time distribution