Problem A
Quantum Superposition — Problem Statistics

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Submissions	4568
Accepted submissions	1489
Submission ratio	32.60%
Authors	1339
Full solves [?]	1124
Full solve Ratio	83.94%

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	C	2019-09-11 12:01:55
2	Mirel Cosulschi	0.01 s	C	2023-11-04 16:10:12
3	John Aron M. Entero	0.02 s	C	2025-11-04 14:52:13
4	Bergur Snorrason	0.10 s	C	2022-02-17 17:14:05

#	User	Runtime	Language	Date
1	Erik Nyström	0.24 s	C#	2020-06-17 21:26:07

#	User	Runtime	Language	Date
1	Norbert Voelker	0.08 s	Go	2022-05-13 14:35:56

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.14 s	Haskell	2025-07-04 08:24:56
2	Brent Yorgey	0.49 s	Haskell	2024-07-15 21:52:03

#	User	Runtime	Language	Date
1	Crystal Sharpe	0.09 s	Java	2020-07-08 18:39:44
2	Dylan Smith	0.17 s	Java	2022-01-24 04:07:42
3	Randy G	0.17 s	Java	2023-01-24 00:37:22
4	Daniel Moyer	0.18 s	Java	2017-10-14 23:26:48
5	Ariana Herbst	0.18 s	Java	2017-10-14 23:50:23
6	Charlotte Li	0.20 s	Java	2022-07-19 04:15:40
7	Finn Lidbetter	0.21 s	Java	2017-10-14 21:44:44
8	Nathaniel Lahn	0.21 s	Java	2017-10-14 22:15:43
9	Frank	0.21 s	Java	2025-07-18 18:22:53
10	Jerry Zhou	0.23 s	Java	2023-08-02 19:53:58

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.26 s	JavaScript (SpiderMonkey)	2023-09-23 20:55:34
2	Christian Pilegaard Cederquist	0.43 s	JavaScript (SpiderMonkey)	2023-10-31 16:52:16

#	User	Runtime	Language	Date
1	Josenildo Silva	0.09 s	Python 2	2018-03-24 03:36:04
2	Eric Williamson	0.11 s	Python 2	2017-10-14 21:50:57
3	Cian Ruane	0.11 s	Python 2	2017-10-15 01:34:20
4	Sergio Vieri	0.11 s	Python 2	2018-03-20 13:48:44
5	Victor Zheng	0.13 s	Python 2	2018-12-03 22:06:47
6	Andreas Björklund	0.14 s	Python 2	2019-07-30 18:19:56
7	Måns Magnusson	0.16 s	Python 2	2019-09-25 19:17:45
8	Björn Magnusson	0.16 s	Python 2	2019-09-25 19:18:12
9	Lars Åström	0.16 s	Python 2	2019-09-25 20:37:28
10	Maj Stenmark	0.16 s	Python 2	2019-09-25 22:03:34

#	User	Runtime	Language	Date
1	Siamul Karim Khan	0.08 s	Python 3	2025-10-12 07:02:59
2	Iftemum Raian	0.08 s	Python 3	2025-12-05 04:03:55
3	Akarshan Mishra	0.08 s	Python 3	2025-12-09 02:55:12
4	Johannes Nivala	0.10 s	Python 3	2025-10-02 14:36:18
5	Akash Melethil	0.11 s	Python 3	2017-10-29 03:14:59
6	Victor Zheng	0.11 s	Python 3	2018-12-03 21:48:34
7	Oskar Haarklou Veileborg	0.11 s	Python 3	2022-09-24 14:08:47
8	crapcode	0.11 s	Python 3	2022-09-25 23:55:20
9	Muaadh Alhamdi	0.11 s	Python 3	2025-11-27 12:34:17
10	Jed Yang	0.13 s	Python 3	2025-01-03 05:18:09

#	User	Runtime	Language	Date
1	Thomas Feld	0.21 s	Ruby	2025-11-19 13:32:06

#	User	Runtime	Language	Date
1	Muhammad Irham Rasyidi	0.02 s	Rust	2019-07-29 13:34:43
2	Krish Lal	0.02 s	Rust	2025-11-23 04:08:50
3	Lasse Møldrup	0.06 s	Rust	2022-09-24 15:07:14
4	Bas Dirks	0.07 s	Rust	2024-02-24 14:01:27

#	User	Length	Language	Date
1	Mirel Cosulschi	2454	C	2023-11-04 16:10:12
2	Hidden user	2538	C	2019-09-11 12:01:55
3	Bergur Snorrason	2560	C	2022-02-17 17:14:05
4	John Aron M. Entero	3462	C	2025-11-04 14:52:13

#	User	Length	Language	Date
1	Erik Nyström	4855	C#	2020-06-17 21:26:07

#	User	Length	Language	Date
1	Guan Han Li	663	C++	2022-10-04 00:16:52
2	Mathias Gernez	806	C++	2023-08-29 20:03:00
3	Alan Cheng	858	C++	2025-11-11 05:11:49
4	Đặng Xuân Minh Khôi	864	C++	2025-07-19 16:02:52
5	Ragur Krishnan	886	C++	2019-06-04 07:19:20
6	Teikn Smith	901	C++	2024-05-25 20:30:20
7	我谔谔	915	C++	2022-02-19 17:05:00
8	Peeranat Kongkijpipat	947	C++	2022-02-02 04:50:41
9	zengmaoyuan	950	C++	2024-05-03 08:59:10
10	Bảo Toàn Nguyễn Ngọc	952	C++	2024-10-28 03:21:30

#	User	Length	Language	Date
1	Norbert Voelker	2207	Go	2022-05-13 14:35:56

#	User	Length	Language	Date
1	Steinar Simonnes	785	Haskell	2025-07-04 08:39:33
2	Brent Yorgey	9739	Haskell	2024-07-15 21:52:03

#	User	Length	Language	Date
1	Jiru Xu	1324	Java	2017-10-15 00:40:48
2	Doug Goodman	1445	Java	2018-04-12 00:02:08
3	Avery Whitaker	1717	Java	2017-10-14 23:09:59
4	Peter Steele	1777	Java	2017-10-14 20:47:56
5	Malte Larsson	1897	Java	2020-11-15 20:38:12
6	Reuben James Loquinario	1922	Java	2025-10-20 18:59:06
7	Suhas T. Nagar	1979	Java	2022-10-14 01:04:58
8	Sizhe Zheng	2252	Java	2026-01-07 21:54:49
9	Paul Chen	2306	Java	2023-09-11 03:58:43
10	Ethan Li	2308	Java	2021-01-10 17:14:10

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	523	JavaScript (SpiderMonkey)	2023-09-23 23:03:09
2	Christian Pilegaard Cederquist	1677	JavaScript (SpiderMonkey)	2023-10-31 16:52:16

#	User	Length	Language	Date
1	Victor Zheng	813	Python 2	2018-12-03 22:18:05
2	Jeff Robertson	884	Python 2	2017-10-15 00:58:23
3	Björn Magnusson	905	Python 2	2019-09-25 19:18:12
4	Lars Åström	905	Python 2	2019-09-25 20:37:28
5	Sergio Vieri	1004	Python 2	2018-03-20 13:48:44
6	Måns Magnusson	1073	Python 2	2019-09-25 19:17:45
7	Maj Stenmark	1073	Python 2	2019-09-25 22:03:34
8	Josenildo Silva	1103	Python 2	2018-03-24 03:36:04
9	Andreas Björklund	1154	Python 2	2019-07-30 18:19:56
10	Cian Ruane	1180	Python 2	2017-10-15 01:34:20

#	User	Length	Language	Date
1	Ahmed Chamseddine	460	Python 3	2025-05-07 13:44:49
2	Yong Mao	681	Python 3	2025-06-15 18:18:52
3	Thomas Vu	786	Python 3	2018-03-17 07:46:21
4	Victor Zheng	793	Python 3	2018-12-03 22:17:48
5	Kelly Dance	824	Python 3	2023-04-10 02:22:41
6	Krish Shah	834	Python 3	2025-05-22 23:41:38
7	Zongliang Ji	877	Python 3	2017-10-14 23:37:10
8	Joshua Chin	879	Python 3	2017-10-14 21:39:47
9	Casper Rysgaard	913	Python 3	2022-09-24 14:20:58
10	Daniel Mitchell	929	Python 3	2017-10-15 00:33:29

#	User	Length	Language	Date
1	Thomas Feld	217	Ruby	2025-11-19 13:32:06

#	User	Length	Language	Date
1	Lasse Møldrup	2273	Rust	2022-09-24 15:07:14
2	Krish Lal	3648	Rust	2025-11-23 04:08:50
3	Bas Dirks	3945	Rust	2024-02-24 14:19:40
4	Muhammad Irham Rasyidi	4369	Rust	2019-07-29 13:34:43

Solution running time distribution