Problem I
Reduced ID Numbers — Problem Statistics

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Submissions	2344
Accepted submissions	1040
Submission ratio	44.37%
Authors	776
Full solves [?]	707
Full solve Ratio	91.11%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.03 s	C	2018-12-17 10:09:42
2	Ivan Petrov	0.04 s	C	2019-07-23 15:18:28
3	junhao Lin	0.06 s	C	2022-11-25 08:23:50
4	Sambit Palit	0.10 s	C	2020-11-10 06:25:55
5	Hidden user	0.39 s	C	2019-05-05 07:15:12
6	劉力勳	0.40 s	C	2022-12-02 11:02:49
7	FISH MARS & 芋仔	0.40 s	C	2022-12-02 11:06:30
8	Jacob Phillips	0.43 s	C	2025-04-22 01:16:37
9	邱彥誌	0.46 s	C	2022-12-04 08:02:14
10	Chang Jie Leong	0.49 s	C	2019-05-05 08:14:16

#	User	Runtime	Language	Date
1	Գոռ Բաղդասարյան	0.27 s	C#	2025-11-21 14:02:39
2	Andriy Zyevakov	0.36 s	C#	2023-01-18 19:02:18
3	Tom Ilestrand	0.38 s	C#	2019-04-04 14:11:18
4	Mikael Fiala-Lundström	0.82 s	C#	2021-07-06 23:23:22

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	C++	2019-12-02 15:11:37
2	Tan Jun An	0.02 s	C++	2017-12-20 06:24:49
3	Johan Wind	0.02 s	C++	2018-03-19 02:56:08
4	Armen Andreasyan	0.02 s	C++	2019-01-05 10:01:25
5	Scott MacIntosh	0.02 s	C++	2019-10-11 04:04:20
6	Christopher MacDonald	0.02 s	C++	2019-10-23 20:15:07
7	人外沙耶	0.02 s	C++	2021-06-25 03:03:05
8	蔡易霖	0.02 s	C++	2022-04-09 04:47:13
9	顏冬旭	0.02 s	C++	2022-04-27 08:37:30
10	Hidden user	0.02 s	C++	2022-05-25 17:58:06

#	User	Runtime	Language	Date
1	Hidden user	0.20 s	Common Lisp	2019-08-05 04:18:55

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.70 s	F#	2023-01-10 18:06:28

#	User	Runtime	Language	Date
1	Norbert Voelker	0.27 s	Go	2021-09-13 19:49:48

#	User	Runtime	Language	Date
1	Liam Keliher	0.09 s	Java	2017-12-11 22:49:40
2	Sven Rönnbäck	0.10 s	Java	2022-11-20 17:14:56
3	Intrets	0.12 s	Java	2019-11-30 20:59:52
4	José Vander Meulen	0.15 s	Java	2018-02-21 23:56:27
5	Steven Cheng	0.18 s	Java	2020-05-04 23:51:41
6	Loic Lecharlier	0.25 s	Java	2018-02-23 20:44:01
7	Josenildo Silva	0.27 s	Java	2018-11-21 23:47:44
8	Bjørn Dons	0.27 s	Java	2019-01-02 23:46:26
9	Hidden user	0.28 s	Java	2020-11-16 20:31:09
10	Benjamin Chen	0.28 s	Java	2022-02-19 01:19:32

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.09 s	JavaScript (SpiderMonkey)	2023-03-16 07:59:28
2	Bjørn Chr. Soltvedt	0.95 s	JavaScript (SpiderMonkey)	2020-08-27 01:21:02

#	User	Runtime	Language	Date
1	Timothy Gaede	0.61 s	Julia	2024-04-14 08:32:23

#	User	Runtime	Language	Date
1	Eric Huynh	0.72 s	Kotlin	2019-02-03 02:43:47
2	Hidden user	0.76 s	Kotlin	2020-03-06 00:33:54
3	Phường Lên	0.77 s	Kotlin	2020-02-03 19:56:34
4	Adam Rankin	0.83 s	Kotlin	2023-04-28 00:49:00

#	User	Runtime	Language	Date
1	Hidden user	0.06 s	Python 2	2019-12-01 21:46:02
2	Hidden user	0.22 s	Python 2	2017-12-08 15:53:30
3	Peter Beattie	0.36 s	Python 2	2018-04-09 15:43:37
4	Hermon Mulat	0.36 s	Python 2	2018-09-10 04:25:11
5	Kasra Ghodsi	0.36 s	Python 2	2018-10-13 18:27:08
6	Ram Basnet	0.36 s	Python 2	2018-12-06 20:54:43
7	Andreas Björklund	0.36 s	Python 2	2018-12-14 06:12:02
8	Johann Ly	0.36 s	Python 2	2018-12-17 09:40:35
9	Florian Cassayre	0.36 s	Python 2	2019-03-29 14:00:53
10	Brian Bui	0.37 s	Python 2	2019-11-16 00:05:09

#	User	Runtime	Language	Date
1	Garway Mei	0.17 s	Python 3	2025-04-22 00:57:02
2	Hidden user	0.20 s	Python 3	2019-12-02 15:14:13
3	Ocram Esah	0.27 s	Python 3	2022-04-01 19:31:08
4	Ola Dahl	0.35 s	Python 3	2023-01-01 11:42:53
5	Samuel McDowell	0.38 s	Python 3	2025-03-27 22:54:36
6	Tristan Curtis	0.38 s	Python 3	2025-04-21 23:43:23
7	Christopher Marquez	0.38 s	Python 3	2025-05-06 22:28:31
8	Kadin Matotek	0.38 s	Python 3	2025-06-15 11:46:37
9	Hidden user	0.38 s	Python 3	2025-07-26 18:48:15
10	Hrant Hovhannisyan	0.38 s	Python 3	2025-09-03 10:08:32

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.02 s	Rust	2025-07-25 18:23:49
2	Loïc CARR	0.21 s	Rust	2018-12-15 19:17:50
3	David Rasch	0.32 s	Rust	2023-09-15 11:37:11
4	Anthony Audoin	0.34 s	Rust	2021-01-23 16:19:39
5	Benjamin Crocker	0.52 s	Rust	2024-09-23 18:58:08
6	Stephen Downward	0.56 s	Rust	2020-09-14 21:53:32
7	Bas Dirks	0.58 s	Rust	2022-01-19 23:01:14
8	Eric Pinter	0.66 s	Rust	2020-06-02 11:07:24

#	User	Length	Language	Date
1	劉力勳	433	C	2022-12-02 11:02:49
2	FISH MARS & 芋仔	457	C	2022-12-02 11:06:30
3	junhao Lin	462	C	2022-11-25 08:23:50
4	Chang Jie Leong	521	C	2019-05-05 08:14:16
5	Jacob Phillips	558	C	2025-04-22 01:16:37
6	Ivan Petrov	573	C	2019-07-23 15:18:28
7	Hidden user	659	C	2019-05-05 07:15:12
8	Sambit Palit	660	C	2020-11-10 06:25:55
9	邱彥誌	791	C	2022-12-04 08:02:14
10	Bergur Snorrason	4869	C	2018-12-17 10:09:42

#	User	Length	Language	Date
1	Գոռ Բաղդասարյան	881	C#	2025-11-21 14:02:39
2	Tom Ilestrand	960	C#	2019-04-04 14:11:18
3	Mikael Fiala-Lundström	968	C#	2021-07-06 23:23:22
4	Andriy Zyevakov	7754	C#	2023-01-18 19:02:18

#	User	Length	Language	Date
1	Onea Adrian	276	C++	2021-04-10 08:36:00
2	Ping	332	C++	2024-05-23 16:09:53
3	蘇子甯J106 25	332	C++	2025-05-31 04:42:58
4	刀影雷文	345	C++	2025-05-27 13:40:09
5	程睿	353	C++	2025-08-11 08:27:45
6	at c	354	C++	2023-04-20 19:57:28
7	eden cheng	355	C++	2025-07-05 05:01:53
8	Zane Yu	356	C++	2019-01-23 13:35:45
9	YanHao Ling	360	C++	2018-03-04 09:53:35
10	Christian Yongwhan Lim	361	C++	2023-06-03 00:46:48

#	User	Length	Language	Date
1	Hidden user	451	Common Lisp	2019-08-05 03:30:54

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	630	F#	2023-01-10 18:06:28

#	User	Length	Language	Date
1	Norbert Voelker	1630	Go	2021-09-13 19:49:48

#	User	Length	Language	Date
1	Doug Goodman	515	Java	2018-04-16 20:11:52
2	Mark Wen	527	Java	2022-02-19 00:45:37
3	Josenildo Silva	534	Java	2018-11-21 23:47:44
4	Thomas King	552	Java	2020-04-15 18:14:44
5	Oskar Larsson	613	Java	2018-10-01 07:50:33
6	Ibraheem Aloran	618	Java	2019-09-27 03:53:20
7	Hidden user	620	Java	2019-04-07 00:02:47
8	Firaol Bulo	633	Java	2023-10-29 19:27:37
9	David Van Nguyen	644	Java	2024-07-14 04:25:07
10	Osama Hajjouz	655	Java	2024-04-15 02:16:19

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	434	JavaScript (SpiderMonkey)	2023-03-16 07:59:28
2	Bjørn Chr. Soltvedt	552	JavaScript (SpiderMonkey)	2020-08-27 01:01:38

#	User	Length	Language	Date
1	Timothy Gaede	1124	Julia	2024-04-14 08:32:23

#	User	Length	Language	Date
1	Adam Rankin	334	Kotlin	2023-04-28 00:49:00
2	Eric Huynh	574	Kotlin	2019-02-03 02:43:47
3	Phường Lên	805	Kotlin	2020-02-03 19:56:34
4	Hidden user	919	Kotlin	2020-03-06 00:33:54

#	User	Length	Language	Date
1	Lars Åström	144	Python 2	2019-11-08 15:15:50
2	Hidden user	151	Python 2	2018-09-02 00:41:24
3	João Pedro Alvito	191	Python 2	2018-12-17 23:17:41
4	Ciara Godwin	203	Python 2	2017-12-09 16:30:50
5	Johann Ly	262	Python 2	2018-12-17 09:40:35
6	Andreas Björklund	271	Python 2	2018-12-14 06:12:02
7	Riko Jacob	284	Python 2	2020-11-27 13:53:20
8	Brian Bui	286	Python 2	2019-11-16 00:05:09
9	Alexander Viklund	288	Python 2	2019-03-29 13:41:31
10	Hidden user	297	Python 2	2017-12-08 15:53:30

#	User	Length	Language	Date
1	Thomas Feld	69	Python 3	2023-03-09 14:12:16
2	Benjamin Z White	69	Python 3	2023-05-20 12:33:51
3	Clement Oh	69	Python 3	2023-07-02 07:35:45
4	Lawry Sorenson	72	Python 3	2025-10-31 01:08:10
5	Lee Isaac	94	Python 3	2022-11-12 21:04:45
6	Guk Yi Siong	94	Python 3	2025-01-07 05:39:31
7	Christofer Ohlsson	111	Python 3	2022-10-05 13:22:09
8	David Aldenbro	116	Python 3	2025-08-27 22:46:01
9	Ahmed Chamseddine	117	Python 3	2024-09-13 09:35:02
10	Hidden user	119	Python 3	2022-12-04 23:31:06

#	User	Length	Language	Date
1	David Rasch	471	Rust	2023-09-15 11:37:11
2	Vincent Lagerros	491	Rust	2025-06-11 13:26:55
3	Benjamin Crocker	603	Rust	2024-09-23 18:58:08
4	Bas Dirks	683	Rust	2022-01-19 23:01:14
5	Stephen Downward	768	Rust	2020-09-14 21:53:32
6	Loïc CARR	953	Rust	2018-12-15 19:17:50
7	Anthony Audoin	987	Rust	2021-01-23 16:19:39
8	Eric Pinter	1172	Rust	2020-06-02 11:07:24

Solution running time distribution