Problem A
How many 0's? — Problem Statistics

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Submissions	1867
Accepted submissions	883
Submission ratio	47.30%
Authors	737
Accepted authors	590
Author ratio	80.05%

#	User	Runtime	Language	Date
1	David Flemström	0.01 s	C	2014-04-30 00:20:17
2	貓貓吃狗狗	0.01 s	C	2015-10-29 17:26:37
3	Josenildo Silva	0.01 s	C	2017-01-27 22:57:20
4	Mikael Frisk	0.01 s	C	2017-10-01 10:55:12
5	Sergio Huhuhu	0.01 s	C	2018-06-09 06:38:35
6	Henrik Lindström	0.01 s	C	2019-05-15 17:12:40
7	Wilson Styres	0.01 s	C	2020-09-23 01:20:30
8	Andrew Sand	0.01 s	C	2024-02-26 06:19:35
9	Hidden user	0.01 s	C	2024-10-02 13:34:06
10	Ivan Petrov	0.04 s	C	2019-08-15 09:18:58

#	User	Runtime	Language	Date
1	masosz	0.06 s	C#	2015-03-03 21:45:01
2	Khin Nyunt	0.06 s	C#	2016-04-09 15:55:29
3	Bas te Kolste	0.07 s	C#	2015-06-17 17:13:50
4	Milan Brumec	0.07 s	C#	2015-10-28 10:31:23
5	Rasmus Brants	0.07 s	C#	2017-05-20 14:04:18
6	Heracles	0.07 s	C#	2018-11-14 19:08:49
7	Benjamin Pintér	0.09 s	C#	2016-06-18 23:08:35

#	User	Runtime	Language	Date
1	Grae Yeandle	0.00 s	C++	2017-01-22 18:29:18
2	Adam Combler	0.00 s	C++	2018-05-01 17:30:53
3	Fredrik Präntare	0.00 s	C++	2018-09-02 19:46:35
4	Leif Eriksson	0.00 s	C++	2022-04-27 16:54:56
5	Theodor Beskow	0.00 s	C++	2022-08-13 23:08:02
6	Artemis Ngoh	0.00 s	C++	2023-10-13 23:23:27
7	Alexander Kravberg	0.00 s	C++	2023-12-31 04:56:09
8	Darryl Teo	0.00 s	C++	2024-02-20 15:03:26
9	Tan Kwang Thiag	0.00 s	C++	2024-03-28 19:04:04
10	Gergely Dániel Péter	0.00 s	C++	2024-10-08 21:04:49

#	User	Runtime	Language	Date
1	Vilhelm Melkstam	0.02 s	Go	2022-05-13 12:39:23
2	Johan Fogelström	0.50 s	Go	2014-12-15 23:25:55

#	User	Runtime	Language	Date
1	Oskar Segersvärd	0.05 s	Haskell	2014-12-14 21:32:22
2	Mattias Harrysson	0.06 s	Haskell	2015-11-28 15:59:59
3	Brent Yorgey	0.06 s	Haskell	2018-06-11 19:14:15
4	Hidden user	0.06 s	Haskell	2023-11-29 12:39:26

#	User	Runtime	Language	Date
1	Samuel Klingström	0.09 s	Java	2017-07-21 22:36:30
2	Crystal Sharpe	0.11 s	Java	2021-04-28 10:09:55
3	Simon Klein	0.13 s	Java	2013-05-14 13:58:33
4	Håkan Warnquist	0.13 s	Java	2013-05-14 16:19:51
5	Carl Henrik Klåvus	0.13 s	Java	2013-05-14 17:03:48
6	Kai Widell Niigata	0.13 s	Java	2014-04-28 18:55:53
7	Daniel Hollsten	0.13 s	Java	2014-12-01 23:12:45
8	Jan Štola	0.13 s	Java	2015-05-28 23:21:23
9	Dexter Gramfors	0.13 s	Java	2015-11-27 14:06:27
10	Hidden user	0.13 s	Java	2015-12-01 11:45:45

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	JavaScript (SpiderMonkey)	2014-11-30 16:48:22
2	Hidden user	0.05 s	JavaScript (SpiderMonkey)	2014-11-27 16:12:04
3	Christian Cederquist	0.12 s	JavaScript (SpiderMonkey)	2023-08-02 17:00:19

#	User	Runtime	Language	Date
1	Adam Rankin	0.39 s	Kotlin	2023-11-10 05:13:56
2	Silas Lenz	0.40 s	Kotlin	2019-05-24 22:53:25
3	Cheatahh	0.48 s	Kotlin	2025-04-21 16:25:24
4	Phường Lên	0.52 s	Kotlin	2020-04-30 04:07:17

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.07 s	Python 2	2015-08-10 12:00:26
2	Bertrand Evertz	0.07 s	Python 2	2018-04-18 18:56:15
3	Andrei Stoica	0.09 s	Python 2	2017-10-27 12:33:50
4	Tore Norderud	0.12 s	Python 2	2015-04-29 21:48:30
5	Bernhard Kartefla	0.12 s	Python 2	2016-09-26 03:09:40
6	Ómar Högni Guðmarsson	0.12 s	Python 2	2016-09-26 11:58:54
7	Andreas Serra	0.16 s	Python 2	2014-04-27 19:26:21
8	Andreas Björklund	0.16 s	Python 2	2020-11-25 20:32:47
9	Hidden user	0.17 s	Python 2	2017-04-15 17:09:01
10	Hermon Mulat	0.18 s	Python 2	2017-10-29 19:12:58

#	User	Runtime	Language	Date
1	test test	0.07 s	Python 3	2025-05-08 17:41:45
2	Anton Nilsson	0.07 s	Python 3	2025-05-14 15:34:56
3	Martin Johansen	0.07 s	Python 3	2025-05-16 02:52:52
4	Arturas Aleksandrauskas	0.08 s	Python 3	2019-04-26 18:40:32
5	Olle Ulfvin	0.08 s	Python 3	2025-05-08 17:58:05
6	Johan von Axelson	0.08 s	Python 3	2025-05-13 12:53:31
7	Michael Birtman	0.08 s	Python 3	2025-05-16 11:54:00
8	Jonathan Byman	0.09 s	Python 3	2023-05-03 18:44:49
9	Oliver Green	0.09 s	Python 3	2023-05-04 13:42:21
10	Emanuel Särnhammar	0.09 s	Python 3	2023-05-21 17:30:56

#	User	Runtime	Language	Date
1	Chris Weston	0.09 s	Ruby	2016-02-20 17:15:13
2	Naoki Mizuno	0.11 s	Ruby	2016-04-07 09:05:00
3	Thomas Feld	0.11 s	Ruby	2023-05-25 13:51:57

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2024-05-29 19:38:50
2	Anton Iacobaeus	0.02 s	Rust	2023-05-05 12:50:42
3	Lukas Olof Ingemarsson	0.02 s	Rust	2025-05-03 16:12:22

#	User	Runtime	Language	Date
1	Hidden user	0.03 s	Swift	2023-11-29 12:30:58

#	User	Length	Language	Date
1	Josenildo Silva	389	C	2017-01-27 22:57:20
2	Hidden user	813	C	2024-10-02 13:34:06
3	Wilson Styres	890	C	2020-09-23 01:20:30
4	Henrik Lindström	897	C	2019-05-15 17:15:42
5	Ivan Petrov	917	C	2019-08-15 09:18:58
6	Andrew Sand	935	C	2024-02-27 03:28:53
7	貓貓吃狗狗	1058	C	2015-10-29 17:26:37
8	Sergio Huhuhu	1096	C	2018-06-09 06:38:35
9	David Flemström	1355	C	2014-04-30 00:20:17
10	Bernd Schmidt	1400	C	2017-06-10 12:48:11

#	User	Length	Language	Date
1	Khin Nyunt	846	C#	2017-09-13 13:47:16
2	Bas te Kolste	1240	C#	2015-06-17 17:13:50
3	Rasmus Brants	1735	C#	2017-05-20 14:04:18
4	masosz	1906	C#	2015-03-03 21:45:01
5	Heracles	2115	C#	2018-11-14 19:08:49
6	Milan Brumec	2896	C#	2015-10-28 10:31:23
7	Benjamin Pintér	6084	C#	2016-06-18 22:57:25

#	User	Length	Language	Date
1	Alexander Engström	234	C++	2023-10-09 00:32:37
2	Emil Lenngren	394	C++	2013-05-14 15:49:46
3	Jordi Rodríguez Manso	414	C++	2018-08-20 11:31:22
4	Niklas Rosén	442	C++	2014-06-30 02:41:24
5	金轩城	445	C++	2020-03-10 18:51:51
6	Gunnar Engström	469	C++	2023-04-17 15:02:28
7	Leif Eriksson	492	C++	2024-04-22 19:48:21
8	Lawrence Li	495	C++	2016-03-17 06:04:44
9	Carl Thomé	513	C++	2014-06-27 02:58:28
10	Johan Wind	536	C++	2018-10-21 14:30:36

#	User	Length	Language	Date
1	Johan Fogelström	947	Go	2014-12-15 23:25:55
2	Vilhelm Melkstam	973	Go	2022-05-13 12:39:41

#	User	Length	Language	Date
1	Hidden user	468	Haskell	2023-11-29 12:39:26
2	Mattias Harrysson	1147	Haskell	2015-11-28 15:59:59
3	Brent Yorgey	1756	Haskell	2018-06-11 19:14:15
4	Oskar Segersvärd	2844	Haskell	2014-12-14 21:32:22

#	User	Length	Language	Date
1	Doug Goodman	751	Java	2017-12-22 21:26:04
2	Jasper Pillejera	826	Java	2019-02-08 14:43:01
3	Jonathan Hartnett	898	Java	2018-09-11 08:14:30
4	Omar Brome	967	Java	2016-09-12 21:35:19
5	Daniel Hollsten	1024	Java	2014-12-01 23:12:45
6	Chad Hayen	1088	Java	2018-09-11 06:26:15
7	Micah Stairs	1121	Java	2016-09-02 18:39:17
8	Alaabas Alhaj Ali	1171	Java	2018-04-23 01:13:05
9	Esther Chong	1205	Java	2023-09-02 16:02:03
10	Carl Eriksson	1212	Java	2014-12-02 20:52:26

#	User	Length	Language	Date
1	Christian Cederquist	576	JavaScript (SpiderMonkey)	2023-08-02 17:00:19
2	Hidden user	613	JavaScript (SpiderMonkey)	2014-11-30 16:48:22
3	Hidden user	1064	JavaScript (SpiderMonkey)	2014-11-27 16:12:04

#	User	Length	Language	Date
1	Cheatahh	1049	Kotlin	2025-04-21 16:25:24
2	Phường Lên	1222	Kotlin	2020-04-30 04:07:17
3	Adam Rankin	1388	Kotlin	2023-11-10 05:13:56
4	Silas Lenz	2599	Kotlin	2019-05-23 13:04:38

#	User	Length	Language	Date
1	Andreas Björklund	424	Python 2	2020-11-25 20:32:47
2	Christofer Ohlsson	440	Python 2	2015-08-10 12:00:26
3	Andrei Stoica	485	Python 2	2017-10-27 12:33:50
4	Bertrand Evertz	511	Python 2	2018-04-18 18:56:15
5	Haggai Liu	552	Python 2	2017-09-17 01:14:45
6	Denis Benčič	591	Python 2	2019-01-31 20:38:27
7	Hidden user	593	Python 2	2019-02-02 21:03:35
8	Hermon Mulat	602	Python 2	2017-10-29 19:12:58
9	Hidden user	638	Python 2	2017-04-15 17:09:01
10	Tore Norderud	766	Python 2	2015-04-29 21:48:30

#	User	Length	Language	Date
1	Gustav Elmqvist	159	Python 3	2023-04-28 01:14:55
2	Anton Nilsson	198	Python 3	2025-05-16 09:17:13
3	Lee Yi Heng	203	Python 3	2024-03-21 18:15:35
4	Hidden user	214	Python 3	2023-06-29 01:52:30
5	Louis Abraham	230	Python 3	2017-04-01 13:49:51
6	Laura Oksanen	332	Python 3	2024-04-24 14:27:10
7	Nicholas Russell Saerang	356	Python 3	2023-08-20 01:10:07
8	vance	409	Python 3	2020-02-05 07:56:25
9	Ethan Lu	414	Python 3	2023-06-28 05:09:06
10	Sharan Magavi	418	Python 3	2019-10-12 22:00:23

#	User	Length	Language	Date
1	Thomas Feld	127	Ruby	2023-05-25 13:51:57
2	Naoki Mizuno	448	Ruby	2016-04-07 09:05:00
3	Chris Weston	643	Ruby	2016-02-20 17:15:13

#	User	Length	Language	Date
1	Anton Iacobaeus	1245	Rust	2023-05-05 12:50:42
2	Lukas Olof Ingemarsson	1330	Rust	2025-05-03 16:12:22
3	Vincent Lagerros	4902	Rust	2024-05-29 19:38:50

#	User	Length	Language	Date
1	Hidden user	499	Swift	2023-11-29 12:30:58

Solution running time distribution