Problem A
Add 'Em Up! — Problem Statistics

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Submissions	5802
Accepted submissions	852
Submission ratio	14.68%
Authors	1338
Full solves [?]	626
Full solve Ratio	46.79%

#	User	Runtime	Language	Date
1	Lucas Towers	0.03 s	C	2022-09-10 06:30:51
2	klimisnotmilk	0.03 s	C	2023-05-23 08:13:39
3	Isaac Pashenkov	0.04 s	C	2020-08-25 01:49:21
4	Alexander Bilde Pedersen	0.05 s	C	2025-01-01 18:55:12
5	Hidden user	0.12 s	C	2023-02-08 13:26:13
6	Filip Hovorka	0.20 s	C	2020-12-15 03:01:59
7	Hidden user	0.38 s	C	2024-07-16 10:42:53

#	User	Runtime	Language	Date
1	David Parker	0.08 s	C#	2025-06-18 17:01:11
2	Martin Walker	0.08 s	C#	2025-06-27 23:15:40
3	Andreas Windefelt	0.09 s	C#	2024-11-22 11:15:42
4	Narod Gars Garabedian	0.10 s	C#	2020-04-08 12:24:07
5	Oliver Degnemark Larsen	0.12 s	C#	2023-04-10 16:39:07
6	Simon Grey	0.15 s	C#	2025-06-22 09:25:11
7	Bjarke Brodin	0.24 s	C#	2020-09-04 19:46:17
8	Robert Warnestam	1.87 s	C#	2020-03-20 23:24:50

#	User	Runtime	Language	Date
1	Steven Halim	0.02 s	C++	2019-12-09 15:07:07
2	Teodor Riddarhaage	0.02 s	C++	2020-10-04 13:57:35
3	Lucia Tirta Gunawan	0.02 s	C++	2021-01-18 16:53:34
4	Nicholas Foo Chuan Le	0.02 s	C++	2021-01-22 16:48:03
5	Lin Lee	0.02 s	C++	2021-05-19 10:59:53
6	Frank Endriss	0.02 s	C++	2021-11-10 17:40:22
7	Árni Bjarnsteinsson	0.02 s	C++	2022-02-23 11:31:28
8	Akash S	0.02 s	C++	2023-02-10 01:37:21
9	Shukai Zhang	0.02 s	C++	2024-10-19 00:12:45
10	Jason Cannon	0.03 s	C++	2019-11-09 18:21:57

#	User	Runtime	Language	Date
1	Juan Miguel Vilar	0.16 s	Haskell	2020-08-31 14:57:39
2	Hidden user	0.19 s	Haskell	2022-04-13 16:41:18
3	Brent Yorgey	0.25 s	Haskell	2019-11-27 23:17:56
4	Caleb Surovik	0.25 s	Haskell	2021-11-07 02:21:10
5	Aaron Allen	0.56 s	Haskell	2021-12-01 04:17:30

#	User	Runtime	Language	Date
1	John Ladera	0.18 s	Java	2019-12-07 04:14:36
2	Bjørn Dons	0.21 s	Java	2024-07-28 20:57:03
3	Sharon Barak	0.23 s	Java	2021-02-28 20:29:56
4	Darko Aleksic	0.24 s	Java	2022-10-01 12:58:28
5	Crystal Sharpe	0.25 s	Java	2021-03-05 01:52:33
6	Doug Goodman	0.26 s	Java	2020-01-28 17:25:48
7	Arup Ratan Guha	0.27 s	Java	2021-03-06 05:55:10
8	Eric Leow Yu Quan	0.27 s	Java	2022-01-15 11:31:38
9	Morten Flensborg Jensen	0.28 s	Java	2020-03-29 22:54:29
10	Erik Tegler	0.29 s	Java	2019-11-15 15:37:53

#	User	Runtime	Language	Date
1	Jun Kim	0.19 s	JavaScript (Node.js)	2024-11-30 05:15:14
2	Ster Sar	0.20 s	JavaScript (Node.js)	2023-06-18 15:42:27
3	Kenneth Chen	0.24 s	JavaScript (Node.js)	2022-07-03 18:26:58
4	Samuel Högfeldt	0.28 s	JavaScript (Node.js)	2022-07-07 12:48:32

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.08 s	JavaScript (SpiderMonkey)	2023-08-13 19:29:52
2	J M	0.15 s	JavaScript (SpiderMonkey)	2021-07-25 18:57:27

#	User	Runtime	Language	Date
1	Timothy Gaede	0.76 s	Julia	2024-08-07 07:21:24

#	User	Runtime	Language	Date
1	Jonathan Soo	0.54 s	Kotlin	2019-11-11 03:47:05
2	Peter Mikkelsen	0.56 s	Kotlin	2020-07-12 16:01:21
3	Jacob Huebner	0.58 s	Kotlin	2020-02-24 02:24:11
4	Troels Bjerre Lund	0.65 s	Kotlin	2019-11-14 21:46:41
5	Mohsen Dehbashi	0.74 s	Kotlin	2021-03-06 07:11:58
6	Paul McBurney	0.84 s	Kotlin	2024-02-03 17:19:52
7	Frederik Bjørn Groben Nielsen	0.91 s	Kotlin	2021-03-06 21:54:28

#	User	Runtime	Language	Date
1	Johan Lyts	0.08 s	Python 2	2020-10-17 21:18:26
2	Yanmarshus Bachtiar	0.09 s	Python 2	2020-10-07 05:31:10
3	Maj Stenmark	0.10 s	Python 2	2019-11-16 17:31:53
4	Lars Åström	0.11 s	Python 2	2019-11-15 15:32:32
5	Måns Magnusson	0.11 s	Python 2	2019-11-15 15:46:27
6	Andreas Björklund	0.11 s	Python 2	2019-12-17 15:50:24
7	Nick Wu	0.17 s	Python 2	2019-11-09 19:08:50
8	Sigurður Jens Albertsson	0.37 s	Python 2	2019-11-26 23:59:00

#	User	Runtime	Language	Date
1	Petr	0.08 s	Python 3	2025-06-03 00:25:02
2	Medwin Manoj	0.09 s	Python 3	2024-11-08 21:40:48
3	ScreenL	0.09 s	Python 3	2024-11-08 23:46:04
4	Tanzim Hossain	0.09 s	Python 3	2024-11-10 02:17:09
5	Erik Simonsson	0.09 s	Python 3	2025-05-17 23:16:17
6	Ethan Ermovick	0.10 s	Python 3	2024-02-03 17:14:46
7	Mohammed Raeesul Irfan Riaz Ahmed	0.10 s	Python 3	2024-11-09 18:18:27
8	Caroline Borg	0.11 s	Python 3	2020-04-07 21:36:06
9	Ian DeHaan	0.11 s	Python 3	2020-04-11 17:12:15
10	Angie Z	0.11 s	Python 3	2022-12-06 17:56:47

#	User	Runtime	Language	Date
1	Klas af Geijerstam	0.01 s	Rust	2020-01-22 16:20:39
2	Vincent Lagerros	0.01 s	Rust	2024-06-02 15:10:57
3	Eric Pinter	0.02 s	Rust	2020-05-30 18:29:08
4	Samuel Kyletoft	0.02 s	Rust	2020-09-10 22:14:39
5	Jason Hooper	0.02 s	Rust	2022-05-29 14:17:20
6	Ng Tek In	0.02 s	Rust	2022-08-28 18:02:07
7	Pär Söderhjelm	0.03 s	Rust	2020-08-06 05:09:58
8	Isak Jägberg	0.03 s	Rust	2021-07-01 15:41:00
9	Lasse Grosbøl-Rais	0.03 s	Rust	2023-10-18 14:34:38
10	Daniel Anker Hermansen	0.04 s	Rust	2023-05-24 13:17:31

#	User	Length	Language	Date
1	klimisnotmilk	1060	C	2023-05-23 08:13:39
2	Hidden user	1394	C	2023-02-08 13:26:13
3	Filip Hovorka	1815	C	2020-12-15 03:01:59
4	Lucas Towers	2436	C	2022-09-10 06:30:51
5	Isaac Pashenkov	3395	C	2020-08-25 01:49:21
6	Hidden user	3839	C	2024-07-16 10:39:50
7	Alexander Bilde Pedersen	12106	C	2025-01-01 18:55:12

#	User	Length	Language	Date
1	Simon Grey	1306	C#	2025-06-22 09:31:45
2	Bjarke Brodin	1438	C#	2020-09-04 19:46:17
3	Narod Gars Garabedian	2123	C#	2020-04-08 12:24:07
4	Andreas Windefelt	2441	C#	2024-11-22 11:15:42
5	Martin Walker	3451	C#	2025-06-27 23:15:40
6	David Parker	4191	C#	2025-06-17 19:13:21
7	Oliver Degnemark Larsen	4519	C#	2023-04-10 16:39:07
8	Robert Warnestam	5567	C#	2020-03-20 23:24:50

#	User	Length	Language	Date
1	Jerome Leow	634	C++	2021-01-20 03:45:16
2	Evan Michael Bailey	642	C++	2023-09-14 01:10:54
3	Dmitry Lyubshin	660	C++	2023-03-25 03:18:17
4	Xinyi Shi	663	C++	2024-11-09 01:17:17
5	Kevin Sun	726	C++	2019-11-09 16:18:57
6	Simone Moretti	730	C++	2020-10-19 23:14:13
7	Robert Lee	742	C++	2024-11-10 01:34:27
8	Jerry Mao	747	C++	2021-03-05 02:25:27
9	Tuấn Nông	758	C++	2020-11-19 16:11:21
10	DucHuynh	772	C++	2024-04-15 13:09:39

#	User	Length	Language	Date
1	Aaron Allen	946	Haskell	2021-12-01 04:17:30
2	Caleb Surovik	1040	Haskell	2021-11-07 02:21:10
3	Hidden user	1974	Haskell	2022-04-13 16:41:18
4	Brent Yorgey	2626	Haskell	2019-11-27 23:17:56
5	Juan Miguel Vilar	3078	Haskell	2020-08-31 14:57:39

#	User	Length	Language	Date
1	Emmett Jesrani	916	Java	2021-08-22 18:50:38
2	Paul Boddington	1144	Java	2020-07-13 20:05:25
3	HUANG YUQI	1186	Java	2022-06-21 09:46:00
4	Alice Ryhl	1259	Java	2019-11-15 15:41:01
5	Andrew Li	1278	Java	2024-11-09 00:55:12
6	Gan Hong Yao	1305	Java	2021-05-02 17:11:27
7	Doug Goodman	1362	Java	2020-01-28 17:25:48
8	Eric Leow Yu Quan	1362	Java	2021-01-18 15:47:44
9	Reiden Ong	1369	Java	2023-12-13 11:21:04
10	Robert Ward	1395	Java	2020-10-10 04:18:39

#	User	Length	Language	Date
1	Jun Kim	1544	JavaScript (Node.js)	2024-11-30 05:15:14
2	Ster Sar	1807	JavaScript (Node.js)	2023-06-18 15:42:27
3	Samuel Högfeldt	2473	JavaScript (Node.js)	2022-07-07 12:48:32
4	Kenneth Chen	2920	JavaScript (Node.js)	2022-07-03 18:26:58

#	User	Length	Language	Date
1	J M	876	JavaScript (SpiderMonkey)	2021-07-25 18:57:27
2	Christian Pilegaard Cederquist	1169	JavaScript (SpiderMonkey)	2023-08-13 19:29:52

#	User	Length	Language	Date
1	Timothy Gaede	1525	Julia	2024-08-07 07:21:24

#	User	Length	Language	Date
1	Troels Bjerre Lund	1065	Kotlin	2019-11-14 21:46:41
2	Jacob Huebner	1240	Kotlin	2020-02-24 02:24:11
3	Peter Mikkelsen	1329	Kotlin	2020-07-11 16:33:23
4	Mohsen Dehbashi	1907	Kotlin	2021-03-06 07:11:58
5	Frederik Bjørn Groben Nielsen	2168	Kotlin	2021-03-06 21:54:28
6	Paul McBurney	2240	Kotlin	2024-02-03 17:28:28
7	Jonathan Soo	4225	Kotlin	2019-11-11 03:47:05

#	User	Length	Language	Date
1	Andreas Björklund	602	Python 2	2019-12-17 15:50:24
2	Johan Lyts	624	Python 2	2020-10-17 21:18:26
3	Lars Åström	649	Python 2	2019-11-15 15:32:32
4	Nick Wu	657	Python 2	2019-11-09 19:08:50
5	Måns Magnusson	669	Python 2	2019-11-15 15:46:27
6	Maj Stenmark	669	Python 2	2019-11-16 17:31:53
7	Yanmarshus Bachtiar	862	Python 2	2020-10-07 05:31:10
8	Sigurður Jens Albertsson	1056	Python 2	2019-11-26 23:59:00

#	User	Length	Language	Date
1	Lukas Kerren	210	Python 3	2024-05-23 16:17:36
2	Benjamin Z White	308	Python 3	2023-08-02 14:27:54
3	Wouter Dijkstra	309	Python 3	2025-05-15 10:47:02
4	Josh Taylor	369	Python 3	2023-07-25 19:10:41
5	George Zhang	371	Python 3	2024-11-10 01:36:28
6	Justin Su	423	Python 3	2020-11-29 01:36:45
7	David Lolck	429	Python 3	2019-11-15 15:27:14
8	Hrant Hovhannisyan	441	Python 3	2026-01-08 09:02:17
9	Zayne Siew Rui Ze	446	Python 3	2023-05-24 18:51:25
10	Teikn Smith	488	Python 3	2022-07-09 00:22:20

#	User	Length	Language	Date
1	Klas af Geijerstam	1320	Rust	2020-01-22 16:20:39
2	Ng Tek In	1460	Rust	2022-08-28 18:02:07
3	Eric Pinter	1757	Rust	2020-05-30 18:29:08
4	Pär Söderhjelm	1891	Rust	2020-08-06 05:09:58
5	Lasse Grosbøl-Rais	1936	Rust	2023-10-18 14:34:38
6	Bas Dirks	2169	Rust	2022-01-14 00:51:18
7	Alexander Nortung	2390	Rust	2020-10-29 00:42:25
8	Ritwin Narra	2463	Rust	2021-06-18 04:44:49
9	Samuel Kyletoft	2557	Rust	2020-09-10 22:14:39
10	Martin Moos Hansen	2999	Rust	2023-07-13 11:05:07

Solution running time distribution