Problem A
Popcorn — Problem Statistics

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Submissions	3798
Accepted submissions	2197
Submission ratio	57.85%
Authors	928
Full solves [?]	689
Full solve Ratio	74.25%

#	User	Score	Language	Date
1	Chenzhang Hu	100	Bash	2023-09-08 14:25:22
2	Thomas Feld	100	Bash	2023-09-27 09:21:43
3	Frans Meulenbroeks	50	Bash	2024-10-12 19:13:02
4	Rafail Loizou	50	Bash	2025-02-19 21:22:07

#	User	Score	Language	Date
1	Bergur Snorrason	100	C	2022-02-19 13:45:41
2	Hidden user	100	C	2022-07-13 14:20:42
3	Oscar Brink	100	C	2023-10-25 08:30:13
4	Levi Migom	100	C	2024-03-12 18:55:46
5	Mariusz Oskar Kurek	50	C	2022-04-16 13:11:29
6	Adam Månsson	50	C	2022-06-30 11:33:45
7	Davi Breda	50	C	2022-11-09 20:55:21
8	Angelo Iñigo	50	C	2022-11-14 06:57:48
9	João Victor Ferrareis Ribeiro	50	C	2022-11-28 19:19:16
10	Mattheus Colares	50	C	2022-12-01 03:45:03

#	User	Score	Language	Date
1	GraViX	100	C#	2021-04-23 17:31:27
2	Daniel Juhl	100	C#	2022-02-25 17:42:07
3	Hidden user	100	C#	2022-10-23 16:52:21
4	Marcus Sebastian Emil Holmgaard	100	C#	2023-06-17 08:30:22
5	Julian Boy	100	C#	2023-10-30 20:15:35
6	Michael Damsgaard	100	C#	2024-11-03 21:29:04
7	Martin Eriksen	100	C#	2024-11-20 14:11:25
8	Գոռ Բաղդասարյան	100	C#	2025-11-11 08:47:53
9	Simon Johann Skødt	50	C#	2022-02-25 18:01:53
10	Joshua Gerber	50	C#	2022-10-10 20:07:39

#	User	Score	Language	Date
1	Michal Žáček	100	Common Lisp	2022-12-19 20:40:09
2	Timothy Bilik	100	Common Lisp	2023-02-11 18:40:38

#	User	Score	Language	Date
1	Hidden user	100	Elixir	2024-11-08 18:30:39

#	User	Score	Language	Date
1	Norbert Voelker	100	Go	2022-02-20 21:37:21
2	Thomas	100	Go	2024-01-05 00:17:17
3	Andrew Gemmel	50	Go	2022-12-06 03:13:15
4	Nikolaj Alsøe	50	Go	2024-09-07 15:24:48

#	User	Score	Language	Date
1	Zohaib Hassan	50	JavaScript (Node.js)	2025-10-04 23:27:41

#	User	Score	Language	Date
1	Jimmy Gustafsson	100	JavaScript (SpiderMonkey)	2022-09-06 23:17:36
2	Christian Pilegaard Cederquist	100	JavaScript (SpiderMonkey)	2023-01-29 15:23:59
3	Bjørn Chr. Soltvedt	100	JavaScript (SpiderMonkey)	2024-06-28 17:35:45

#	User	Score	Language	Date
1	Timothy Gaede	100	Julia	2024-07-15 08:42:23

#	User	Score	Language	Date
1	Peter Mikkelsen	100	Kotlin	2022-06-28 18:05:01
2	Adam Rankin	100	Kotlin	2023-05-12 03:51:28
3	Joseph Smith	50	Kotlin	2022-02-25 07:25:08

#	User	Score	Language	Date
1	Zeke Stephens	50	Lua	2025-02-11 16:58:43

#	User	Score	Language	Date
1	Ingemar Ragnemalm	50	Pascal	2023-03-19 15:34:17

#	User	Score	Language	Date
1	Jiaye Will Wang	50	Perl	2024-08-21 18:19:26

#	User	Score	Language	Date
1	Andriy Zyevakov	100	Prolog	2024-02-16 06:23:27

#	User	Score	Language	Date
1	Johan Lyts	100	Python 2	2022-03-10 21:35:01
2	David Zacek	100	Python 2	2022-12-19 20:38:20
3	Ingemar Ragnemalm	100	Python 2	2023-03-19 15:50:49
4	Adriaan de Vries	100	Python 2	2023-09-19 12:19:45
5	Isak Fagermo	100	Python 2	2023-09-29 11:02:01
6	Aaron C	100	Python 2	2026-03-02 18:15:54

#	User	Score	Language	Date
1	Miorel Palii	100	Ruby	2022-03-25 08:02:09
2	Klas af Geijerstam	100	Ruby	2022-10-04 15:12:35
3	Thomas Feld	100	Ruby	2022-11-28 12:41:04
4	dick move	100	Ruby	2022-12-07 04:39:43
5	Noah Hessen Bjerke	100	Ruby	2022-12-10 14:35:28
6	Jiaye Will Wang	100	Ruby	2024-08-21 18:20:02
7	Chenzhang Hu	100	Ruby	2025-09-22 14:29:14
8	Si Jie Tan	100	Ruby	2025-12-12 09:41:30

#	User	Score	Language	Date
1	Philippe C. Léger	100	TypeScript	2024-10-04 19:38:12

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Bash	2023-09-27 09:21:43
2	Chenzhang Hu	0.07 s	Bash	2023-09-08 14:25:22

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.00 s	C	2022-02-19 13:45:41
2	Hidden user	0.00 s	C	2022-07-13 14:20:42
3	Oscar Brink	0.00 s	C	2023-10-25 08:30:13
4	Levi Migom	0.00 s	C	2024-03-12 18:55:46

#	User	Runtime	Language	Date
1	GraViX	0.03 s	C#	2021-04-23 17:31:27
2	Daniel Juhl	0.03 s	C#	2022-02-25 17:42:07
3	Hidden user	0.03 s	C#	2022-10-23 16:52:21
4	Marcus Sebastian Emil Holmgaard	0.04 s	C#	2023-06-17 08:30:22
5	Julian Boy	0.04 s	C#	2023-10-30 20:15:35
6	Martin Eriksen	0.04 s	C#	2024-11-20 14:11:25
7	Գոռ Բաղդասարյան	0.04 s	C#	2025-11-11 08:47:53
8	Michael Damsgaard	0.05 s	C#	2024-11-03 21:29:04

#	User	Runtime	Language	Date
1	Michal Žáček	0.01 s	Common Lisp	2022-12-19 20:40:09
2	Timothy Bilik	0.01 s	Common Lisp	2023-02-11 18:40:38

#	User	Runtime	Language	Date
1	Hidden user	0.54 s	Elixir	2024-11-08 18:32:09

#	User	Runtime	Language	Date
1	Thomas	0.00 s	Go	2024-01-05 00:17:17
2	Norbert Voelker	0.07 s	Go	2022-02-20 21:37:21

#	User	Runtime	Language	Date
1	Joost Linthorst	0.04 s	Java	2024-09-05 14:29:44
2	Bassam Alfarhan	0.04 s	Java	2024-10-06 11:33:17
3	Love Engman	0.04 s	Java	2024-10-22 22:24:31
4	Adrian Borup	0.04 s	Java	2024-10-27 20:03:09
5	Stela Palii	0.04 s	Java	2024-12-05 22:41:02
6	Markus Bao	0.04 s	Java	2025-11-19 17:03:30
7	pothyne	0.04 s	Java	2026-01-20 15:33:10
8	Karl Michelsen	0.06 s	Java	2021-04-23 16:41:22
9	Crystal Sharpe	0.06 s	Java	2022-02-22 04:57:11
10	Asmus Tørsleff	0.06 s	Java	2022-02-25 16:35:59

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2022-09-06 23:17:36
2	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-29 15:23:59
3	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2024-06-28 17:35:45

#	User	Runtime	Language	Date
1	Timothy Gaede	0.53 s	Julia	2024-07-15 08:42:23

#	User	Runtime	Language	Date
1	Adam Rankin	0.16 s	Kotlin	2023-05-12 03:51:28
2	Peter Mikkelsen	0.17 s	Kotlin	2022-06-28 18:05:01

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.02 s	Prolog	2024-02-16 06:23:27

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.02 s	Python 2	2023-03-19 15:50:49
2	Johan Lyts	0.03 s	Python 2	2022-03-10 21:35:01
3	David Zacek	0.03 s	Python 2	2022-12-19 20:38:20
4	Adriaan de Vries	0.03 s	Python 2	2023-09-19 12:19:45
5	Isak Fagermo	0.03 s	Python 2	2023-09-29 11:02:01
6	Aaron C	0.08 s	Python 2	2026-03-02 18:15:54

#	User	Runtime	Language	Date
1	Samúel Arnar Hafsteinsson	0.04 s	Python 3	2022-06-21 15:36:49
2	Elias Lundell	0.04 s	Python 3	2022-07-04 13:35:26
3	Tobias Glimmerfors	0.04 s	Python 3	2022-07-04 13:42:29
4	Hugo Ekinge	0.04 s	Python 3	2022-07-04 13:57:38
5	Bruno Harju	0.04 s	Python 3	2022-07-04 14:04:31
6	Måns Edvardsson	0.04 s	Python 3	2022-07-04 14:13:07
7	Fattis	0.04 s	Python 3	2022-07-04 14:28:06
8	Alfred Stellan	0.04 s	Python 3	2022-07-04 14:38:30
9	Martin Zhang	0.04 s	Python 3	2022-07-04 15:02:29
10	Emilio	0.04 s	Python 3	2022-07-07 18:45:20

#	User	Runtime	Language	Date
1	Miorel Palii	0.05 s	Ruby	2022-03-25 08:02:09
2	Klas af Geijerstam	0.06 s	Ruby	2022-10-04 15:12:35
3	Thomas Feld	0.06 s	Ruby	2022-11-28 12:41:04
4	dick move	0.06 s	Ruby	2022-12-07 04:39:43
5	Noah Hessen Bjerke	0.06 s	Ruby	2022-12-10 14:35:28
6	Si Jie Tan	0.06 s	Ruby	2025-12-12 09:42:00
7	Jiaye Will Wang	0.07 s	Ruby	2024-08-21 18:20:02
8	Chenzhang Hu	0.12 s	Ruby	2025-09-22 14:29:14

#	User	Runtime	Language	Date
1	Philippe C. Léger	0.04 s	TypeScript	2024-10-04 19:38:12

#	User	Length	Language	Date
1	Chenzhang Hu	27	Bash	2025-09-13 17:42:23
2	Thomas Feld	28	Bash	2023-09-27 09:21:43

#	User	Length	Language	Date
1	Hidden user	373	C	2022-07-13 14:20:42
2	Levi Migom	1291	C	2024-03-12 18:55:46
3	Bergur Snorrason	1684	C	2022-02-19 13:45:41
4	Oscar Brink	2336	C	2023-10-25 08:30:13

#	User	Length	Language	Date
1	Գոռ Բաղդասարյան	274	C#	2025-11-11 08:47:53
2	GraViX	423	C#	2021-04-23 17:31:27
3	Hidden user	460	C#	2022-10-23 16:52:21
4	Daniel Juhl	729	C#	2022-02-25 17:42:07
5	Julian Boy	771	C#	2023-10-30 20:15:35
6	Martin Eriksen	869	C#	2024-11-20 14:11:25
7	Michael Damsgaard	3649	C#	2024-11-03 21:29:04
8	Marcus Sebastian Emil Holmgaard	3951	C#	2023-06-17 08:30:22

#	User	Length	Language	Date
1	Alexander Skidanov	241	C++	2024-11-18 21:32:43
2	Andrey Stepanov	241	C++	2024-11-18 22:05:31
3	Yeung Man Tsung	253	C++	2022-11-18 11:43:03
4	Ivan	255	C++	2024-11-18 21:26:20
5	Mohsen Mahroos	301	C++	2022-10-17 11:28:35
6	Titus Chew	307	C++	2025-02-28 12:48:20
7	Miriam Drei	369	C++	2022-10-14 13:52:03
8	Nicholas Winschel	414	C++	2023-04-05 03:55:56
9	David Sun	432	C++	2025-07-24 08:59:47
10	Richard Wang	440	C++	2023-10-02 20:32:19

#	User	Length	Language	Date
1	Michal Žáček	51	Common Lisp	2022-12-19 20:43:07
2	Timothy Bilik	160	Common Lisp	2023-02-11 18:40:38

#	User	Length	Language	Date
1	Hidden user	280	Elixir	2024-11-08 18:32:09

#	User	Length	Language	Date
1	Thomas	676	Go	2024-01-05 00:17:17
2	Norbert Voelker	707	Go	2022-02-20 21:37:21

#	User	Length	Language	Date
1	Yujin Kim	46	Haskell	2025-08-28 07:29:36
2	Jonas Haukenes	53	Haskell	2026-03-03 10:42:42
3	Klas af Geijerstam	90	Haskell	2022-10-04 06:57:17
4	Sebastian Banert	99	Haskell	2024-07-07 22:28:20
5	Steinar Simonnes	152	Haskell	2025-03-10 15:09:26
6	Leslie Yip	155	Haskell	2022-09-27 11:19:26
7	Helmut Maierhofer	169	Haskell	2023-10-17 20:16:26
8	Julina Savela	175	Haskell	2026-01-28 22:51:30
9	Shinji Koshida	201	Haskell	2024-12-19 21:46:42
10	Brent Yorgey	246	Haskell	2022-02-20 23:47:02

#	User	Length	Language	Date
1	Evan Magill	409	Java	2022-11-22 00:28:53
2	Andrea	430	Java	2023-09-05 07:57:09
3	Allan Nouri	440	Java	2024-03-15 19:16:37
4	Alexander McCollum	440	Java	2024-05-02 04:40:43
5	Nikoline Olander Rasmussen	451	Java	2022-02-25 16:59:43
6	Markus Bao	456	Java	2025-11-19 17:03:30
7	Timothy Wan Kai Yang	461	Java	2022-10-11 11:11:01
8	Frank Ruskey	462	Java	2024-02-21 02:53:01
9	John Kellogg	465	Java	2023-01-26 04:51:47
10	Adam A	467	Java	2025-11-04 18:13:58

#	User	Length	Language	Date
1	Jimmy Gustafsson	47	JavaScript (SpiderMonkey)	2022-09-06 23:17:36
2	Bjørn Chr. Soltvedt	52	JavaScript (SpiderMonkey)	2024-06-28 17:35:45
3	Christian Pilegaard Cederquist	133	JavaScript (SpiderMonkey)	2023-01-29 15:23:59

#	User	Length	Language	Date
1	Timothy Gaede	140	Julia	2024-07-15 08:42:23

#	User	Length	Language	Date
1	Adam Rankin	270	Kotlin	2023-05-12 03:51:28
2	Peter Mikkelsen	482	Kotlin	2022-06-28 18:07:39

#	User	Length	Language	Date
1	Andriy Zyevakov	268	Prolog	2024-02-16 06:23:27

#	User	Length	Language	Date
1	Adriaan de Vries	35	Python 2	2023-09-19 12:19:45
2	David Zacek	41	Python 2	2022-12-19 20:38:20
3	Johan Lyts	46	Python 2	2022-03-10 21:35:01
4	Aaron C	59	Python 2	2026-03-02 18:15:54
5	Isak Fagermo	78	Python 2	2023-09-29 11:02:01
6	Ingemar Ragnemalm	197	Python 2	2023-03-19 15:50:49

#	User	Length	Language	Date
1	Hidden user	31	Python 3	2022-12-02 21:35:13
2	Hu Yijie	34	Python 3	2022-10-03 15:43:51
3	Clement Oh	34	Python 3	2023-05-12 15:45:40
4	Martin Handest	34	Python 3	2023-09-14 09:57:43
5	Jiaye Will Wang	34	Python 3	2024-08-21 18:17:44
6	Victorio NASCIMENTO	34	Python 3	2025-02-17 01:38:14
7	Hidden user	35	Python 3	2022-10-23 19:04:27
8	Harry Zhang	35	Python 3	2023-01-06 18:06:33
9	Frans Meulenbroeks	35	Python 3	2024-10-12 19:14:18
10	Rafail Loizou	35	Python 3	2025-02-19 21:04:56

#	User	Length	Language	Date
1	Thomas Feld	24	Ruby	2022-12-06 12:05:26
2	dick move	24	Ruby	2022-12-07 04:39:43
3	Jiaye Will Wang	25	Ruby	2024-08-21 18:20:02
4	Klas af Geijerstam	27	Ruby	2022-10-04 15:12:35
5	Si Jie Tan	30	Ruby	2025-12-12 09:42:00
6	Noah Hessen Bjerke	51	Ruby	2022-12-10 14:35:28
7	Miorel Palii	68	Ruby	2022-03-25 08:02:09
8	Chenzhang Hu	123	Ruby	2025-09-22 14:29:14

#	User	Length	Language	Date
1	Jonathan Blomlöf	179	Rust	2024-03-27 02:28:15
2	Mariusz Oskar Kurek	224	Rust	2022-04-16 13:15:54
3	Alexander Skovsende	243	Rust	2022-02-25 16:46:45
4	Niels Inselmann Christiansen	277	Rust	2022-02-25 16:28:15
5	Kosuke Onodera	301	Rust	2025-07-03 09:44:09
6	Sean Hagen	329	Rust	2024-01-02 04:59:56
7	Emil Viftrup	330	Rust	2023-11-27 10:56:25
8	David Rasch	414	Rust	2022-06-28 11:44:38
9	Karl Emil Tølbøll	448	Rust	2024-05-07 18:09:06
10	Winston Wu	451	Rust	2025-11-20 04:09:25

#	User	Length	Language	Date
1	Philippe C. Léger	441	TypeScript	2024-10-04 19:38:12

Solution running time distribution