Problem I
Backspace — Problem Statistics

Back to problem description

Submissions	1445
Accepted submissions	908
Submission ratio	62.84%
Authors	416
Full solves [?]	361
Full solve Ratio	86.78%

#	User	Score	Language	Date
1	Lasse Overgaard	100	C	2024-08-26 08:28:06
2	Gabriel Stanculescu	100	C	2024-08-27 14:40:15
3	Marcus Alsted Wegmann	100	C	2025-08-27 12:39:57
4	Matteo Faura Behague	60	C	2023-08-31 19:57:30

#	User	Score	Language	Date
1	Anders Mikkelsen	100	Common Lisp	2023-08-30 16:58:24

#	User	Score	Language	Date
1	Laurits Kure	100	F#	2024-08-28 15:03:43

#	User	Score	Language	Date
1	Leonora Andrea Lindqvist Nielsen	100	Go	2023-08-29 18:28:35

#	User	Score	Language	Date
1	Hidden user	100	JavaScript (Node.js)	2024-08-28 10:31:55
2	Joakim Goyle Dissing	100	JavaScript (Node.js)	2024-08-29 09:43:55

#	User	Score	Language	Date
1	Rasmus Herskind	100	Kotlin	2025-09-02 23:17:14

#	User	Score	Language	Date
1	Andreas Severin Hauch Trøstrup	100	Ruby	2024-08-27 19:02:12
2	Frederik Petersen	100	Ruby	2024-08-28 10:24:49

#	User	Score	Language	Date
1	Hidden user	100	Rust	2023-08-30 15:01:25
2	Emil Dichmann	100	Rust	2023-08-30 16:17:07
3	Andreas Severin Hauch Trøstrup	100	Rust	2024-08-27 18:47:10

#	User	Score	Language	Date
1	Hidden user	60	Scala	2023-09-03 15:47:50
2	Nicolai Grymer	10	Scala	2023-08-30 11:38:44

#	User	Runtime	Language	Date
1	Marcus Alsted Wegmann	0.00 s	C	2025-08-27 12:41:10
2	Lasse Overgaard	0.01 s	C	2024-08-26 08:28:06
3	Gabriel Stanculescu	0.01 s	C	2024-08-27 14:40:15

#	User	Runtime	Language	Date
1	Adrian Kari	0.06 s	C#	2024-08-28 11:52:37
2	Daniel Spandet Grønbjerg	0.07 s	C#	2023-08-30 09:15:07
3	Nicolai Grymer	0.07 s	C#	2023-08-30 14:59:48
4	Phillip Andersen	0.07 s	C#	2023-08-30 20:21:57
5	Ezequiel Padillo Molina	0.07 s	C#	2024-08-28 10:14:45
6	Michael Jeppesen	0.07 s	C#	2024-08-28 10:17:07
7	Sebastian A Borch Andersen	0.08 s	C#	2024-08-28 21:52:20
8	Villum Sonne	0.09 s	C#	2023-08-30 10:21:19
9	Tore Asbjørn Tonnisen Kjelds	0.09 s	C#	2023-08-30 15:11:58
10	Hidden user	0.09 s	C#	2023-09-03 16:31:09

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	C++	2023-08-30 14:19:42
2	Jaime Cruz Ferreira	0.02 s	C++	2023-08-30 15:17:25
3	Thomas Suckfüll	0.02 s	C++	2024-08-28 10:43:38
4	Andrada Condor	0.02 s	C++	2024-08-28 11:12:29
5	Filippo Piloni	0.02 s	C++	2024-08-29 15:26:16
6	Jobayer Hossain	0.02 s	C++	2025-08-27 14:02:54
7	Aske Wachs	0.03 s	C++	2020-07-15 15:24:57
8	Otto Stadel Clausen	0.03 s	C++	2023-08-30 15:17:33
9	Hidden user	0.03 s	C++	2023-08-30 15:36:19
10	Emil	0.03 s	C++	2025-08-27 12:52:00

#	User	Runtime	Language	Date
1	Anders Mikkelsen	0.18 s	Common Lisp	2023-08-30 16:58:24

#	User	Runtime	Language	Date
1	Laurits Kure	0.53 s	F#	2024-08-28 15:03:43

#	User	Runtime	Language	Date
1	Leonora Andrea Lindqvist Nielsen	0.01 s	Go	2023-08-29 18:28:35

#	User	Runtime	Language	Date
1	Emil Bak-Møller	0.14 s	Java	2020-02-11 14:00:41
2	Karl Michelsen	0.14 s	Java	2023-08-30 15:12:59
3	Oskar Jensen	0.17 s	Java	2020-02-10 14:07:43
4	Mikkel Nilsson	0.17 s	Java	2020-02-10 21:12:11
5	Imaz Naseem	0.17 s	Java	2025-08-27 12:49:58
6	Frederik Fink Højriis	0.18 s	Java	2020-02-10 21:07:00
7	Niklas Brynfeldt	0.19 s	Java	2020-02-13 17:31:38
8	Aske Wachs	0.19 s	Java	2020-02-16 22:55:33
9	Lars Djursner Rasmussen	0.19 s	Java	2020-02-17 15:39:12
10	Alexander Maajgard Wermuth	0.19 s	Java	2020-02-20 13:47:43

#	User	Runtime	Language	Date
1	Joakim Goyle Dissing	0.17 s	JavaScript (Node.js)	2024-08-29 09:43:55
2	Hidden user	0.19 s	JavaScript (Node.js)	2024-08-28 10:31:55

#	User	Runtime	Language	Date
1	Rasmus Herskind	0.43 s	Kotlin	2025-09-02 23:17:14

#	User	Runtime	Language	Date
1	Albert Rise Nielsen	0.16 s	Python 3	2023-09-01 21:05:12
2	Joakim Austvold	0.17 s	Python 3	2023-08-30 09:26:18
3	Laurits Bonde	0.17 s	Python 3	2023-08-30 14:25:48
4	Costel-Gabriel Nicutari	0.17 s	Python 3	2023-08-30 16:32:04
5	Hidden user	0.17 s	Python 3	2023-08-31 08:54:12
6	Sarah Christiansen	0.17 s	Python 3	2023-09-02 18:32:44
7	Hidden user	0.17 s	Python 3	2023-09-04 21:28:49
8	Nicoline Madsen	0.17 s	Python 3	2024-08-28 11:11:56
9	Jonathan Opitz	0.17 s	Python 3	2024-08-28 16:05:00
10	Ellen Yue Daetz	0.17 s	Python 3	2024-08-28 20:07:07

#	User	Runtime	Language	Date
1	Marek Gaľa	0.17 s	Python 3 with NumPy	2023-08-30 15:24:34
2	Oleg Jarma Montoya	0.17 s	Python 3 with NumPy	2023-08-30 21:59:26
3	Andreas Benggaard	0.17 s	Python 3 with NumPy	2024-08-28 15:11:05
4	Hidden user	0.17 s	Python 3 with NumPy	2025-08-26 10:19:16
5	Jakub Kozanyi	0.17 s	Python 3 with NumPy	2025-08-27 11:38:19
6	Marek Joukl	0.17 s	Python 3 with NumPy	2025-08-27 12:56:40
7	Benedek Szabó	0.17 s	Python 3 with NumPy	2025-08-27 13:12:14
8	Hidden user	0.17 s	Python 3 with NumPy	2025-08-27 20:22:12
9	Emil Fuhr Nielsen	0.17 s	Python 3 with NumPy	2025-08-28 13:11:44
10	Ondrej Kozanyi	0.17 s	Python 3 with NumPy	2025-08-28 16:36:03

#	User	Runtime	Language	Date
1	Frederik Petersen	0.43 s	Ruby	2024-08-28 10:24:49
2	Andreas Severin Hauch Trøstrup	0.49 s	Ruby	2024-08-27 19:14:54

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Rust	2023-08-30 15:01:25
2	Emil Dichmann	0.01 s	Rust	2023-08-30 16:17:07
3	Andreas Severin Hauch Trøstrup	0.01 s	Rust	2024-08-27 18:47:10

#	User	Length	Language	Date
1	Gabriel Stanculescu	315	C	2024-08-29 19:09:54
2	Lasse Overgaard	587	C	2024-08-26 08:28:06
3	Marcus Alsted Wegmann	656	C	2025-08-27 12:41:10

#	User	Length	Language	Date
1	Lukas L. Hjelmstrand	292	C#	2024-08-28 11:23:41
2	Villum Sonne	482	C#	2023-08-30 10:21:19
3	Michael Jeppesen	537	C#	2024-08-28 10:17:07
4	Sebastian A Borch Andersen	590	C#	2024-08-28 21:52:20
5	Daniel Spandet Grønbjerg	607	C#	2023-08-30 09:15:07
6	Hidden user	607	C#	2023-09-03 16:31:09
7	Daniel Vikkelsø Held-Hansen	612	C#	2024-08-28 12:01:30
8	Viktor Horváth	636	C#	2025-08-27 12:58:02
9	Phillip Andersen	686	C#	2023-08-30 20:21:57
10	Adrian Kari	711	C#	2024-08-28 11:52:37

#	User	Length	Language	Date
1	Aske Wachs	314	C++	2020-07-15 15:24:57
2	Hidden user	334	C++	2023-08-30 14:19:42
3	Oliver Juhl Friis Hansen	377	C++	2025-09-01 22:32:44
4	Emil	379	C++	2025-08-27 12:52:00
5	Filippo Piloni	393	C++	2024-08-29 15:26:16
6	Otto Stadel Clausen	428	C++	2023-08-30 15:17:33
7	Thomas Suckfüll	450	C++	2024-08-28 10:43:38
8	Andrada Condor	525	C++	2024-08-28 11:12:29
9	Jaime Cruz Ferreira	530	C++	2023-08-30 15:17:25
10	Jobayer Hossain	562	C++	2025-08-27 14:02:54

#	User	Length	Language	Date
1	Anders Mikkelsen	469	Common Lisp	2023-08-30 16:58:24

#	User	Length	Language	Date
1	Laurits Kure	2129	F#	2024-08-28 15:03:43

#	User	Length	Language	Date
1	Leonora Andrea Lindqvist Nielsen	400	Go	2023-08-29 18:28:35

#	User	Length	Language	Date
1	Morten Have Hansen	492	Java	2020-02-12 12:45:50
2	Bartłomiej Juszczyk	494	Java	2025-08-27 11:32:02
3	Philipp Thiessen	496	Java	2025-08-24 12:32:33
4	Sara Vieira	497	Java	2024-08-27 20:26:36
5	amanda bache	499	Java	2024-08-27 15:15:42
6	Emil Boesgaard Nørbjerg	507	Java	2025-08-24 11:28:08
7	Lucas Frey Torres Hanson	514	Java	2024-08-28 10:34:56
8	Amidala Hoffmén	514	Java	2024-08-28 10:39:52
9	Jacob Breum	520	Java	2024-08-28 11:57:32
10	Olivia Burca	524	Java	2024-08-28 11:48:49

#	User	Length	Language	Date
1	Joakim Goyle Dissing	488	JavaScript (Node.js)	2024-08-29 09:43:55
2	Hidden user	504	JavaScript (Node.js)	2024-08-28 10:31:55

#	User	Length	Language	Date
1	Rasmus Herskind	370	Kotlin	2025-09-02 23:17:14

#	User	Length	Language	Date
1	Erling Amundsen	71	Python 3	2024-08-29 12:32:15
2	Christian alexander Hetling	74	Python 3	2024-08-29 00:57:09
3	Markus Kristoffer Sibbesen	87	Python 3	2023-08-30 14:42:12
4	Marcus Henrik Simonsen	122	Python 3	2024-08-28 10:07:55
5	Nadja Brix Koch	123	Python 3	2023-08-30 14:19:10
6	Lasse Faurby Klausen	123	Python 3	2023-08-30 14:19:55
7	Hidden user	123	Python 3	2025-08-27 13:01:39
8	Rafael Rohal	123	Python 3	2025-08-29 08:33:53
9	Vincenzo Sabino	124	Python 3	2025-08-27 12:56:10
10	Thor Liam Møller Clausen	125	Python 3	2024-08-26 12:24:24

#	User	Length	Language	Date
1	Hidden user	132	Python 3 with NumPy	2025-08-26 10:19:16
2	Oleg Jarma Montoya	135	Python 3 with NumPy	2023-08-30 21:59:26
3	Hidden user	143	Python 3 with NumPy	2025-08-27 20:22:12
4	Giulia Pinciroli	171	Python 3 with NumPy	2024-08-28 11:15:42
5	Julia Trznadel	172	Python 3 with NumPy	2025-09-02 22:53:56
6	Marek Gaľa	174	Python 3 with NumPy	2023-08-30 15:24:34
7	Marek Joukl	182	Python 3 with NumPy	2025-08-27 12:56:40
8	Ahmad Sattar Atta	183	Python 3 with NumPy	2023-08-29 21:31:34
9	Emil Fuhr Nielsen	187	Python 3 with NumPy	2025-09-04 14:44:53
10	Bogdan-Mihai Cobzaru	188	Python 3 with NumPy	2025-09-02 21:24:46

#	User	Length	Language	Date
1	Andreas Severin Hauch Trøstrup	47	Ruby	2024-08-27 19:14:33
2	Frederik Petersen	47	Ruby	2024-08-28 10:24:49

#	User	Length	Language	Date
1	Andreas Severin Hauch Trøstrup	347	Rust	2024-08-27 18:47:10
2	Emil Dichmann	552	Rust	2023-08-30 16:17:07
3	Hidden user	921	Rust	2023-08-30 15:01:25

Solution running time distribution