Problem I
Inverted Deck — Problem Statistics

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Submissions	2512
Accepted submissions	726
Submission ratio	28.90%
Authors	704
Full solves [?]	586
Full solve Ratio	83.24%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.03 s	C	2019-11-17 16:47:55
2	Eyleifur Bjarkason	0.03 s	C	2019-11-19 23:04:20
3	Lawry Sorenson	0.03 s	C	2023-09-26 04:25:35
4	Ivan Petrov	0.09 s	C	2019-11-19 13:14:35
5	Teikn Smith	0.11 s	C	2023-09-26 00:51:45
6	Macdara mac an tSionnaigh	0.12 s	C	2019-11-20 14:48:49
7	Hidden user	0.12 s	C	2024-02-26 08:31:17

#	User	Runtime	Language	Date
1	Shantanu Sharma	0.31 s	C#	2025-10-13 01:20:03

#	User	Runtime	Language	Date
1	Wesley Leung	0.03 s	C++	2019-11-17 10:08:20
2	Frank Endriss	0.03 s	C++	2021-02-21 16:49:55
3	Hidden user	0.03 s	C++	2021-04-21 09:44:08
4	Agis Daniels	0.03 s	C++	2021-12-24 14:52:39
5	Lawry Sorenson	0.04 s	C++	2023-09-26 04:15:54
6	Jakob Tejs Knudsen	0.07 s	C++	2019-11-22 14:36:35
7	Damjan Polugic	0.08 s	C++	2019-11-17 21:05:22
8	Hidden user	0.08 s	C++	2019-11-26 01:31:07
9	Nick Wu	0.09 s	C++	2019-11-17 09:32:54
10	Wakaka	0.09 s	C++	2019-11-17 09:38:13

#	User	Runtime	Language	Date
1	Rudy Matela	2.95 s	Haskell	2024-11-16 18:37:05

#	User	Runtime	Language	Date
1	Ryan Tan	0.14 s	Java	2022-06-22 18:36:27
2	Bjørn Dons	0.21 s	Java	2019-11-23 18:57:11
3	Ruslan	0.35 s	Java	2023-01-13 05:31:18
4	Alice Ryhl	0.37 s	Java	2019-11-18 10:53:21
5	Quân Anh	0.41 s	Java	2024-04-20 17:10:45
6	Rene Argento	0.42 s	Java	2021-01-31 02:35:06
7	Emil Bak-Møller	0.43 s	Java	2019-11-19 15:52:17
8	Tjibbe van der Veen	0.43 s	Java	2019-11-21 20:38:27
9	Morten Flensborg Jensen	0.43 s	Java	2019-11-26 00:57:17
10	Kadin Tang	0.43 s	Java	2020-10-10 02:46:57

#	User	Runtime	Language	Date
1	Jeremiah Ang	0.97 s	JavaScript (Node.js)	2020-09-16 03:57:09

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.20 s	JavaScript (SpiderMonkey)	2019-11-22 23:18:59
2	David King	0.22 s	JavaScript (SpiderMonkey)	2019-11-25 14:07:26
3	Christian Pilegaard Cederquist	0.22 s	JavaScript (SpiderMonkey)	2023-11-07 23:03:11

#	User	Runtime	Language	Date
1	Timothy Gaede	0.65 s	Julia	2025-11-04 09:59:54

#	User	Runtime	Language	Date
1	Hidden user	0.53 s	Kotlin	2020-02-29 05:33:21
2	Phường Lên	0.98 s	Kotlin	2020-03-02 03:34:50
3	Adam Rankin	0.98 s	Kotlin	2023-10-06 03:17:35
4	Liu Yuhang	1.16 s	Kotlin	2025-04-18 02:16:27

#	User	Runtime	Language	Date
1	Andreas Björklund	0.22 s	Python 2	2019-11-17 10:15:06
2	Oskar Haarklou Veileborg	0.23 s	Python 2	2019-11-18 15:32:59
3	Conor McCauley	0.24 s	Python 2	2019-11-21 10:38:40
4	Troels Bjerre Lund	0.26 s	Python 2	2019-11-17 17:28:23
5	Maj Stenmark	0.26 s	Python 2	2019-11-18 22:28:04
6	Michael Wright	0.29 s	Python 2	2019-11-17 13:42:05
7	Hidden user	0.29 s	Python 2	2020-09-07 17:15:56
8	Anton Lyxell	0.33 s	Python 2	2019-11-17 10:45:27

#	User	Runtime	Language	Date
1	Petr	0.22 s	Python 3	2025-05-07 22:46:05
2	Stanislavs Jefimovs	0.23 s	Python 3	2021-03-25 22:54:54
3	Peter Moorhouse	0.23 s	Python 3	2022-09-22 14:22:37
4	Hidden user	0.24 s	Python 3	2022-09-06 06:06:48
5	Freja Peulicke	0.25 s	Python 3	2021-02-27 15:42:42
6	Gladwin Yeo	0.25 s	Python 3	2022-05-11 08:20:18
7	Jiayi Liu	0.25 s	Python 3	2024-12-19 21:14:47
8	Tsog Gantumur	0.26 s	Python 3	2021-09-22 22:09:12
9	Regnm0ln1	0.26 s	Python 3	2024-12-19 21:25:37
10	Valerio Camaiani	0.27 s	Python 3	2023-11-29 14:56:03

#	User	Runtime	Language	Date
1	Hidden user	0.39 s	Ruby	2019-11-19 19:44:19
2	Thomas Feld	0.73 s	Ruby	2023-10-18 10:54:45

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.02 s	Rust	2024-08-13 17:15:52
2	Daniel Anker Hermansen	0.03 s	Rust	2023-11-15 22:42:01
3	Rudi Svartveit	0.04 s	Rust	2019-11-17 21:02:00
4	Pahlevi Fikri Auliya	0.06 s	Rust	2020-10-24 22:21:04

#	User	Length	Language	Date
1	Teikn Smith	243	C	2023-09-26 02:41:53
2	Ivan Petrov	868	C	2019-11-19 13:14:35
3	Macdara mac an tSionnaigh	1256	C	2019-11-20 14:48:49
4	Lawry Sorenson	1321	C	2023-09-26 04:40:45
5	Hidden user	1341	C	2024-02-26 08:31:17
6	Bergur Snorrason	2035	C	2019-11-17 16:47:55
7	Eyleifur Bjarkason	6043	C	2019-11-19 23:04:20

#	User	Length	Language	Date
1	Shantanu Sharma	1473	C#	2025-10-13 01:20:03

#	User	Length	Language	Date
1	Hao Du	452	C++	2020-05-02 10:59:12
2	Paolo Pellizzoni	475	C++	2019-12-16 18:32:55
3	Tautvydas Jasiūnas	533	C++	2019-11-19 21:32:19
4	Koo Zhuo Hui	534	C++	2023-12-16 10:38:00
5	Alexander Skidanov	544	C++	2024-10-24 15:49:36
6	Kregor Ööbik	578	C++	2025-11-01 22:02:48
7	Seunghyun Joe	580	C++	2019-11-17 10:20:54
8	Mason Horne	589	C++	2023-08-29 02:30:54
9	Tan Kerway	591	C++	2024-12-22 11:35:22
10	Wiwit Rifa'i	600	C++	2019-11-17 09:36:59

#	User	Length	Language	Date
1	Rudy Matela	1201	Haskell	2024-11-16 18:37:05

#	User	Length	Language	Date
1	Hidden user	934	Java	2019-11-18 00:27:14
2	Neamtu Stefan	1027	Java	2019-12-03 15:30:53
3	Mark van Helvoort	1119	Java	2019-11-17 10:41:03
4	Red Dragio	1152	Java	2019-12-19 14:49:22
5	Abdelrahman Mokbel	1154	Java	2022-09-17 00:57:23
6	Doug Goodman	1175	Java	2020-07-07 17:29:08
7	Crystal Sharpe	1237	Java	2020-04-24 17:28:48
8	HUANG YUQI	1237	Java	2022-06-23 20:38:42
9	Artur Satayev	1247	Java	2019-11-17 10:25:31
10	Sadgunsai Yadav	1259	Java	2021-01-24 22:39:49

#	User	Length	Language	Date
1	Jeremiah Ang	1257	JavaScript (Node.js)	2020-09-16 03:57:09

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	890	JavaScript (SpiderMonkey)	2023-11-07 23:03:11
2	David King	1197	JavaScript (SpiderMonkey)	2019-11-25 14:07:26
3	Bjørn Chr. Soltvedt	1287	JavaScript (SpiderMonkey)	2019-11-22 23:18:59

#	User	Length	Language	Date
1	Timothy Gaede	1022	Julia	2025-11-04 09:59:54

#	User	Length	Language	Date
1	Liu Yuhang	447	Kotlin	2025-04-18 02:16:27
2	Adam Rankin	736	Kotlin	2023-10-06 03:17:35
3	Phường Lên	1266	Kotlin	2020-03-02 03:34:50
4	Hidden user	2021	Kotlin	2020-02-29 05:33:21

#	User	Length	Language	Date
1	Troels Bjerre Lund	339	Python 2	2019-11-17 17:28:23
2	Andreas Björklund	492	Python 2	2019-11-17 10:15:06
3	Maj Stenmark	525	Python 2	2019-11-18 22:28:04
4	Anton Lyxell	627	Python 2	2019-11-17 10:45:27
5	Oskar Haarklou Veileborg	666	Python 2	2019-11-18 15:32:59
6	Conor McCauley	729	Python 2	2019-11-21 10:38:40
7	Michael Wright	972	Python 2	2019-11-17 13:42:05
8	Hidden user	1603	Python 2	2020-09-07 17:15:56

#	User	Length	Language	Date
1	Josh Taylor	237	Python 3	2023-09-27 17:36:26
2	Ryan Farrell	246	Python 3	2023-09-25 21:51:20
3	Dhairya Patel	252	Python 3	2020-11-15 23:35:08
4	Albert Elezer B. Perez	302	Python 3	2023-07-05 14:25:09
5	Hrant Hovhannisyan	314	Python 3	2025-07-24 05:32:36
6	Thore Husfeldt	322	Python 3	2019-11-18 19:24:05
7	Troels Bjerre Lund	324	Python 3	2019-11-17 17:26:50
8	Brandon Tang	333	Python 3	2023-05-21 19:53:20
9	Henrik Grønbech	353	Python 3	2019-11-17 17:43:37
10	Ahmed Siadomar	357	Python 3	2022-06-01 21:22:06

#	User	Length	Language	Date
1	Thomas Feld	152	Ruby	2023-10-18 10:54:45
2	Hidden user	523	Ruby	2019-11-19 19:44:19

#	User	Length	Language	Date
1	Rudi Svartveit	1517	Rust	2019-11-17 21:02:00
2	Pahlevi Fikri Auliya	2389	Rust	2020-10-24 22:21:04
3	Vincent Lagerros	10558	Rust	2024-08-13 17:16:38
4	Daniel Anker Hermansen	24612	Rust	2023-11-15 22:42:01

Solution running time distribution