Problem A
Alice in the Digital World — Problem Statistics

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Submissions	8141
Accepted submissions	2062
Submission ratio	25.33%
Authors	2019
Full solves [?]	1585
Full solve Ratio	78.50%

#	User	Runtime	Language	Date
1	Ioannis Br	0.01 s	C	2020-07-04 20:04:16
2	Eyleifur Bjarkason	0.01 s	C	2020-10-19 02:19:25
3	Bergur Snorrason	0.01 s	C	2020-10-19 17:34:33
4	Johan Degn	0.01 s	C	2021-10-05 22:10:35
5	Agis Daniels	0.01 s	C	2022-01-12 22:05:19
6	Lawry Sorenson	0.01 s	C	2025-06-10 12:05:31
7	Benjamin Hsu	0.02 s	C	2020-05-16 03:23:06
8	Hidden user	0.04 s	C	2017-12-13 03:23:21
9	Valenkine	0.04 s	C	2018-02-27 11:46:16
10	Ivan Petrov	0.04 s	C	2019-05-21 08:14:00

#	User	Runtime	Language	Date
1	Jens Erik	0.13 s	C#	2025-11-18 00:16:07
2	Simon Thillemann Nielsen	0.13 s	C#	2025-11-18 00:16:31
3	Ruben Rystedt	0.15 s	C#	2024-11-16 23:48:13
4	Gustav Kalander	0.17 s	C#	2018-06-03 13:43:19
5	Ásþór Björnsson	0.19 s	C#	2019-12-02 16:41:32
6	Frankie Chen	0.20 s	C#	2019-07-25 00:40:03
7	Narod Gars Garabedian	0.20 s	C#	2020-04-08 16:06:18
8	no	0.22 s	C#	2022-11-06 10:21:50

#	User	Runtime	Language	Date
1	Trinh Huu Gia Phuc	0.01 s	C++	2017-10-15 14:19:35
2	Le Tuan Minh	0.01 s	C++	2017-10-15 14:21:07
3	Giang Truong	0.01 s	C++	2017-10-15 15:21:35
4	Patrik Lilja	0.01 s	C++	2018-03-07 21:47:59
5	Tomas Feeney	0.01 s	C++	2018-04-19 01:58:45
6	Chen Shenghao	0.01 s	C++	2019-01-10 02:46:09
7	Jay Lim	0.01 s	C++	2019-02-04 19:06:09
8	Yehezkiel Raymundo Theodoroes	0.01 s	C++	2019-02-10 18:07:25
9	Harrison Shen	0.01 s	C++	2020-04-04 13:12:09
10	Caeden Whitaker	0.01 s	C++	2020-12-27 02:35:27

#	User	Runtime	Language	Date
1	Thomas	0.03 s	Go	2024-01-14 04:03:30
2	Anna Winters	0.28 s	Go	2019-02-03 04:09:21

#	User	Runtime	Language	Date
1	Juan Miguel Vilar	0.15 s	Haskell	2020-11-13 18:05:33
2	Brent Yorgey	0.89 s	Haskell	2018-08-19 17:07:12

#	User	Runtime	Language	Date
1	TRẦN VŨ TRƯỜNG HUY	0.07 s	Java	2024-10-31 14:11:30
2	Khánh Nguyễn Tiến	0.08 s	Java	2018-07-26 07:47:45
3	NGUYỄN CÔNG MINH	0.08 s	Java	2024-10-31 10:59:51
4	Nguyễn Mạnh Phúc	0.10 s	Java	2017-10-17 16:18:06
5	Mehdi Maick	0.10 s	Java	2018-08-12 15:00:07
6	Joakim Algrøy	0.10 s	Java	2018-09-28 23:57:08
7	Dat Vo Nguyen Tien	0.10 s	Java	2022-01-21 14:46:52
8	Đặng Phú Tân	0.10 s	Java	2024-10-30 08:56:28
9	Samuel Klingström	0.12 s	Java	2019-08-16 16:23:41
10	Chen Shenghao	0.13 s	Java	2019-02-06 04:34:52

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.05 s	JavaScript (SpiderMonkey)	2023-06-20 16:41:47
2	Zachary DeStefano	0.09 s	JavaScript (SpiderMonkey)	2018-01-24 03:30:19

#	User	Runtime	Language	Date
1	Hidden user	0.58 s	Julia	2025-03-12 21:44:21
2	Timothy Gaede	0.69 s	Julia	2025-05-28 10:02:44

#	User	Runtime	Language	Date
1	Izzati Al Vandiar	0.56 s	Kotlin	2018-01-08 05:08:54
2	Henning Koehler	0.80 s	Kotlin	2018-11-03 21:52:33
3	Adam Rankin	0.89 s	Kotlin	2023-09-24 04:36:09
4	Phường Lên	0.94 s	Kotlin	2019-11-11 22:28:21

#	User	Runtime	Language	Date
1	Ishpreet Singh Bhasin	0.08 s	OCaml	2026-01-08 10:49:47

#	User	Runtime	Language	Date
1	Toàn Nguyễn	0.04 s	Pascal	2020-04-03 17:15:55

#	User	Runtime	Language	Date
1	Øyvind Haarberg	0.08 s	Python 2	2018-10-02 17:23:31
2	Thomas Feld	0.08 s	Python 2	2020-06-22 11:36:30
3	Hidden user	0.09 s	Python 2	2018-01-25 06:56:32
4	Alex Van Keulen	0.09 s	Python 2	2018-02-04 03:23:24
5	Hidden user	0.09 s	Python 2	2018-05-16 19:38:00
6	Hermon Mulat	0.09 s	Python 2	2018-09-11 23:17:37
7	Måns Magnusson	0.09 s	Python 2	2018-11-08 21:39:56
8	Asger Hautop Drewsen	0.09 s	Python 2	2018-11-10 22:22:58
9	Hidden user	0.09 s	Python 2	2018-12-26 12:21:37
10	Vivaek Cpl	0.09 s	Python 2	2019-03-30 13:26:26

#	User	Runtime	Language	Date
1	Hidden user	0.10 s	Python 3	2022-06-10 16:56:36
2	Noble Bi	0.10 s	Python 3	2022-06-15 08:09:01
3	Mubarek Shikur	0.10 s	Python 3	2022-06-28 16:12:03
4	Manuel Kanahuati Ceballos	0.10 s	Python 3	2022-07-24 19:14:23
5	Timen Bobnar	0.10 s	Python 3	2022-08-01 11:24:44
6	Jack Meyer Garvey	0.10 s	Python 3	2022-10-18 00:31:14
7	Jonathan Allarassem	0.10 s	Python 3	2024-10-08 11:21:52
8	Christian Pletbjerg	0.10 s	Python 3	2024-12-03 11:12:25
9	Hossein Jalili	0.10 s	Python 3	2025-01-05 14:59:50
10	José Antonio Arzate Martínez	0.10 s	Python 3	2025-02-05 22:34:40

#	User	Runtime	Language	Date
1	Hidden user	0.20 s	Ruby	2019-03-21 15:34:24
2	Thomas Feld	0.24 s	Ruby	2023-05-08 09:26:57
3	Hidden user	0.41 s	Ruby	2022-02-05 23:46:27

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Rust	2019-12-09 02:34:58
2	Samuel Kyletoft	0.01 s	Rust	2020-06-24 19:45:30
3	Aaron Lengyel	0.01 s	Rust	2021-11-08 20:55:37
4	Giang Đào	0.01 s	Rust	2023-01-10 15:54:17
5	Ishtiaq Hussain Naqi	0.01 s	Rust	2023-08-20 17:13:30
6	Vincent Lagerros	0.01 s	Rust	2024-05-16 23:00:47
7	Leo Jarhede	0.01 s	Rust	2025-02-20 15:23:34
8	Eric Pinter	0.02 s	Rust	2021-11-28 00:15:09
9	Judith Hemp	0.02 s	Rust	2022-01-25 12:44:59
10	Bas Dirks	0.02 s	Rust	2022-02-09 21:36:25

#	User	Runtime	Language	Date
1	Danial Haseeb	0.14 s	Swift	2023-10-03 12:56:00

#	User	Length	Language	Date
1	Alec Kerrigan	657	C	2020-05-23 04:37:50
2	Emanuel Vasques	702	C	2020-05-22 16:46:23
3	Hidden user	753	C	2017-12-13 03:23:21
4	Will Burke	822	C	2020-05-23 02:18:44
5	Lawry Sorenson	861	C	2025-06-10 12:05:31
6	Armin Ziaei	884	C	2020-09-05 20:12:05
7	Oussama Bourqadi	900	C	2019-08-15 17:39:40
8	Oussama Bourqadi	900	C	2019-08-15 17:40:11
9	Mirel Cosulschi	908	C	2025-03-23 22:08:23
10	Ivan Petrov	916	C	2019-05-21 08:14:00

#	User	Length	Language	Date
1	Ruben Rystedt	1055	C#	2024-11-16 23:48:13
2	Jens Erik	1169	C#	2025-11-18 00:16:07
3	Simon Thillemann Nielsen	1169	C#	2025-11-18 00:16:31
4	Gustav Kalander	1366	C#	2018-06-03 13:43:19
5	Frankie Chen	1583	C#	2019-07-25 00:40:03
6	Ásþór Björnsson	2416	C#	2019-12-02 16:42:06
7	no	3515	C#	2022-11-06 10:21:50
8	Narod Gars Garabedian	3579	C#	2020-04-08 16:06:18

#	User	Length	Language	Date
1	a_b__c	386	C++	2021-03-06 07:24:12
2	Hidden user	422	C++	2022-04-21 09:53:08
3	Richard Lee	439	C++	2018-09-05 07:16:24
4	Hidden user	454	C++	2018-05-16 19:03:50
5	Yassin Bahloul	482	C++	2017-10-20 19:51:19
6	Rishab Pallepati	490	C++	2020-11-28 02:48:10
7	Zane Yu	497	C++	2019-02-06 03:09:42
8	Hidden user	498	C++	2017-12-21 17:09:11
9	Ryan Chew	505	C++	2019-02-06 13:55:54
10	Evan Michael Bailey	506	C++	2023-08-02 04:18:21

#	User	Length	Language	Date
1	Anna Winters	2146	Go	2019-02-03 04:09:21
2	Thomas	2594	Go	2024-01-14 03:55:54

#	User	Length	Language	Date
1	Brent Yorgey	1201	Haskell	2018-08-19 17:07:12
2	Juan Miguel Vilar	3729	Haskell	2020-11-13 18:05:33

#	User	Length	Language	Date
1	Sơn Nguyễn	702	Java	2018-10-16 05:37:27
2	Dylan Smith	848	Java	2020-08-12 03:22:32
3	Jasper Pillejera	867	Java	2019-02-03 06:34:20
4	Jerry Zhu	885	Java	2018-03-15 00:09:38
5	Justin Gaudet	928	Java	2018-09-29 02:02:43
6	Hidden user	939	Java	2018-01-24 07:52:13
7	Crystal Sharpe	944	Java	2020-05-28 05:08:58
8	Sophia Khalis	957	Java	2018-08-12 15:06:20
9	Dương Thái Minh	967	Java	2017-10-15 18:06:50
10	Ryan Looney	987	Java	2019-04-10 06:18:41

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	622	JavaScript (SpiderMonkey)	2023-06-20 16:41:47
2	Zachary DeStefano	772	JavaScript (SpiderMonkey)	2018-01-24 03:30:19

#	User	Length	Language	Date
1	Hidden user	288	Julia	2025-03-12 21:57:30
2	Timothy Gaede	1097	Julia	2025-05-28 10:02:44

#	User	Length	Language	Date
1	Izzati Al Vandiar	908	Kotlin	2018-01-08 05:08:54
2	Henning Koehler	1160	Kotlin	2018-11-03 21:52:33
3	Adam Rankin	1394	Kotlin	2023-09-24 04:36:09
4	Phường Lên	1465	Kotlin	2019-11-11 22:28:21

#	User	Length	Language	Date
1	Ishpreet Singh Bhasin	834	OCaml	2026-01-08 10:49:47

#	User	Length	Language	Date
1	Toàn Nguyễn	951	Pascal	2020-04-03 17:15:55

#	User	Length	Language	Date
1	Thomas Feld	345	Python 2	2020-06-22 11:36:30
2	Lars Åström	433	Python 2	2018-11-09 16:48:21
3	Björn Magnusson	433	Python 2	2018-11-09 18:40:08
4	Hidden user	457	Python 2	2018-05-16 19:38:00
5	Asger Hautop Drewsen	462	Python 2	2018-11-10 22:22:58
6	Jesper Öqvist	507	Python 2	2018-10-17 18:09:44
7	Hidden user	509	Python 2	2018-01-25 06:56:32
8	Måns Magnusson	525	Python 2	2018-11-08 21:39:56
9	Hidden user	528	Python 2	2018-12-26 12:21:37
10	Oskar Haarklou Veileborg	629	Python 2	2018-11-12 09:39:32

#	User	Length	Language	Date
1	Lawry Sorenson	164	Python 3	2025-06-10 11:33:07
2	Benjamin Z White	236	Python 3	2023-06-08 22:21:08
3	Charles Ancheta	285	Python 3	2023-03-24 07:38:41
4	Thibault Raffaillac	298	Python 3	2023-03-16 18:01:33
5	Shawn McCormick	370	Python 3	2018-01-10 07:26:32
6	Paco Criado	385	Python 3	2023-08-25 21:31:33
7	Hidden user	392	Python 3	2023-07-11 09:18:25
8	M Base 2	394	Python 3	2020-07-22 19:13:53
9	Yuenching Shao	399	Python 3	2021-10-14 05:12:00
10	Shang-En Huang	405	Python 3	2023-09-08 04:56:44

#	User	Length	Language	Date
1	Thomas Feld	129	Ruby	2023-05-08 09:26:57
2	Hidden user	468	Ruby	2019-03-21 15:34:24
3	Hidden user	1262	Ruby	2022-02-05 23:46:27

#	User	Length	Language	Date
1	Samuel Kyletoft	1104	Rust	2020-06-25 20:23:40
2	Alexander Berntsson	1578	Rust	2025-02-20 15:05:46
3	Ishtiaq Hussain Naqi	1668	Rust	2023-08-20 17:13:30
4	Eric Pinter	1676	Rust	2021-11-28 00:15:09
5	Hidden user	1756	Rust	2019-12-09 02:31:24
6	Judith Hemp	1936	Rust	2022-01-25 12:44:59
7	Leo Jarhede	2098	Rust	2025-02-20 15:23:34
8	Bas Dirks	2727	Rust	2022-02-09 22:35:27
9	Aaron Lengyel	3785	Rust	2021-11-08 20:55:37
10	Vincent Lagerros	4367	Rust	2024-05-16 23:00:47

#	User	Length	Language	Date
1	Danial Haseeb	826	Swift	2023-10-03 12:56:00

Solution running time distribution