Problem A
Trick or Treat — Problem Statistics

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Submissions	3725
Accepted submissions	1122
Submission ratio	30.12%
Authors	778
Full solves [?]	693
Full solve Ratio	89.07%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.07 s	C	2019-03-05 14:35:43
2	Eyleifur Bjarkason	0.08 s	C	2019-04-03 13:02:14
3	Hidden user	0.20 s	C	2019-08-20 23:49:31
4	USaskAdvanced9	0.23 s	C	2025-10-04 21:46:03
5	Ivan Petrov	0.25 s	C	2019-05-23 09:05:51
6	Sambit Palit	0.30 s	C	2020-12-09 18:25:28
7	Bóas Guðjónsson	0.32 s	C	2023-04-04 02:10:40
8	Sabit Zahin	0.61 s	C	2015-10-20 20:25:22

#	User	Runtime	Language	Date
1	Nathan Andrews	1.74 s	C#	2024-10-15 22:36:40

#	User	Runtime	Language	Date
1	Garðar Ingvarsson	0.11 s	C++	2019-04-05 06:20:04
2	Hidden user	0.21 s	C++	2011-03-01 00:58:22
3	Hidden user	0.22 s	C++	2013-10-27 21:47:09
4	Jonas Kylling	0.22 s	C++	2014-12-15 11:26:18
5	Isabel Ramirez	0.23 s	C++	2022-03-20 04:11:02
6	Markus Mathiasen	0.23 s	C++	2022-08-04 20:02:39
7	Tan Chee Heng	0.24 s	C++	2018-04-22 14:41:00
8	Akash Ramesh Rao	0.24 s	C++	2020-03-02 07:11:50
9	Siman Shrestha	0.24 s	C++	2020-03-22 23:26:36
10	Víctor Hugo	0.24 s	C++	2021-03-04 06:33:12

#	User	Runtime	Language	Date
1	Nathan Lee	0.24 s	Go	2025-10-19 16:11:38
2	Norbert Voelker	0.94 s	Go	2022-06-18 23:44:02

#	User	Runtime	Language	Date
1	William Fiset	0.35 s	Java	2017-02-21 14:25:58
2	Bjørn Dons	0.50 s	Java	2022-12-29 20:29:46
3	Doug Goodman	0.68 s	Java	2018-06-05 22:47:39
4	Santiago Rivas	0.70 s	Java	2025-08-28 19:00:00
5	Micah Stairs	0.72 s	Java	2017-02-13 15:50:33
6	Crystal Sharpe	0.76 s	Java	2021-03-21 04:40:02
7	Magnar Myrtveit	0.78 s	Java	2015-05-03 23:51:50
8	Martijn Muijsers	0.82 s	Java	2020-08-17 21:31:59
9	Rohan Agrawal	0.83 s	Java	2020-03-18 04:58:40
10	Tanner Hoke	0.84 s	Java	2020-03-16 16:46:17

#	User	Runtime	Language	Date
1	Kate Eckhart	0.94 s	JavaScript (Node.js)	2021-02-22 21:08:59

#	User	Runtime	Language	Date
1	Johannes Jensen	0.91 s	JavaScript (SpiderMonkey)	2022-01-05 14:59:45
2	Christian Pilegaard Cederquist	1.42 s	JavaScript (SpiderMonkey)	2023-07-23 21:30:09

#	User	Runtime	Language	Date
1	How Si Wei	1.34 s	OCaml	2020-07-10 09:35:50

#	User	Runtime	Language	Date
1	Maj Stenmark	0.49 s	Python 2	2019-10-18 20:29:39
2	Jordan James	0.51 s	Python 2	2018-03-17 16:54:37
3	Juliang Li	0.58 s	Python 2	2018-03-04 00:30:52
4	Steven Tran	0.88 s	Python 2	2018-03-10 22:57:11
5	Lars Åström	1.01 s	Python 2	2019-10-30 16:58:18
6	Tyler Durden	1.06 s	Python 2	2018-03-05 19:31:25
7	Jordan James	1.08 s	Python 2	2018-03-17 17:13:47
8	Julio Maldonado	1.10 s	Python 2	2019-03-16 06:12:22
9	Måns Magnusson	1.17 s	Python 2	2018-10-29 21:59:53
10	Oskar Larsson	1.48 s	Python 2	2019-04-02 14:24:45

#	User	Runtime	Language	Date
1	Eduardo Alvarez Hernandez	0.62 s	Python 3	2025-03-15 05:30:48
2	Hidden user	0.63 s	Python 3	2023-03-27 09:08:53
3	Benjamin Z White	0.63 s	Python 3	2023-08-30 11:25:22
4	Keshav Dharshan	0.63 s	Python 3	2025-03-14 03:20:09
5	Joseph Chau	0.66 s	Python 3	2024-03-31 00:38:07
6	Ryuki Kobayashi	0.67 s	Python 3	2021-03-14 06:05:25
7	Hidden user	0.67 s	Python 3	2023-03-11 04:09:31
8	Semion Dyadkin	0.67 s	Python 3	2024-03-12 19:43:47
9	Simon Varadaraj	0.68 s	Python 3	2024-03-11 08:20:23
10	Alan Hu	0.68 s	Python 3	2024-10-13 20:13:13

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.05 s	Rust	2025-05-18 02:24:06
2	Muhammad Sohail	0.14 s	Rust	2024-09-20 06:18:49
3	Mckinley Xie	0.17 s	Rust	2025-03-13 06:04:13

#	User	Runtime	Language	Date
1	Hidden user	1.05 s	Swift	2023-10-05 12:26:38

#	User	Length	Language	Date
1	Sabit Zahin	1088	C	2015-10-20 20:25:22
2	Ivan Petrov	1377	C	2019-05-23 09:05:51
3	Hidden user	1483	C	2019-08-20 23:49:31
4	Sambit Palit	1616	C	2020-12-09 18:25:28
5	USaskAdvanced9	1795	C	2025-10-04 21:46:03
6	Bergur Snorrason	2571	C	2019-03-05 14:33:27
7	Bóas Guðjónsson	4715	C	2023-04-04 02:10:40
8	Eyleifur Bjarkason	5897	C	2019-04-02 22:39:28

#	User	Length	Language	Date
1	Nathan Andrews	1265	C#	2024-10-15 22:36:40

#	User	Length	Language	Date
1	Adil Rasiyani	502	C++	2023-03-12 06:11:00
2	Markus Mathiasen	601	C++	2022-08-04 20:02:39
3	Maximiliano Pombo	692	C++	2024-03-15 18:15:40
4	Richard Fu	697	C++	2022-03-17 21:44:10
5	Hyunjun Lee	702	C++	2022-12-11 02:05:02
6	Hidden user	703	C++	2018-03-09 22:41:00
7	Gabriele Genta	703	C++	2025-10-01 10:26:12
8	Thái Trung Đức	724	C++	2016-11-06 09:00:24
9	Reginald Frank	725	C++	2019-04-24 06:50:00
10	rebekka	726	C++	2019-04-10 12:05:46

#	User	Length	Language	Date
1	Nathan Lee	1535	Go	2025-10-19 16:11:38
2	Norbert Voelker	1940	Go	2022-06-18 23:41:01

#	User	Length	Language	Date
1	Doug Goodman	1285	Java	2018-06-05 22:47:39
2	Crystal Sharpe	1286	Java	2021-03-21 04:40:02
3	Mikhail Lavrenov	1358	Java	2024-09-24 03:59:24
4	Nick Wu	1412	Java	2015-10-19 03:23:40
5	Micah Stairs	1502	Java	2017-02-13 15:50:33
6	Hidden user	1536	Java	2020-03-20 07:56:33
7	Finn Lidbetter	1598	Java	2017-02-13 16:02:30
8	Felix Halim	1631	Java	2020-07-08 07:16:20
9	Magnar Myrtveit	1661	Java	2015-05-03 23:51:50
10	Martijn Muijsers	1678	Java	2020-08-17 21:31:59

#	User	Length	Language	Date
1	Kate Eckhart	1983	JavaScript (Node.js)	2021-02-22 09:51:57

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	806	JavaScript (SpiderMonkey)	2023-07-23 21:30:09
2	Johannes Jensen	1407	JavaScript (SpiderMonkey)	2022-01-05 14:59:45

#	User	Length	Language	Date
1	How Si Wei	868	OCaml	2020-07-10 09:48:05

#	User	Length	Language	Date
1	Lars Åström	411	Python 2	2019-10-30 16:58:18
2	Måns Magnusson	575	Python 2	2018-10-29 21:59:53
3	Maj Stenmark	835	Python 2	2019-10-18 20:29:39
4	Jordan James	905	Python 2	2018-03-17 17:13:47
5	Juliang Li	939	Python 2	2018-03-04 00:30:52
6	Jordan James	944	Python 2	2018-03-17 16:54:37
7	Oskar Larsson	972	Python 2	2019-04-02 14:24:45
8	Tyler Durden	1016	Python 2	2018-03-05 19:31:25
9	Steven Tran	1085	Python 2	2018-03-10 22:57:11
10	Julio Maldonado	1223	Python 2	2019-03-16 06:12:22

#	User	Length	Language	Date
1	Jón Atli Guðmundsson	261	Python 3	2024-09-23 00:14:52
2	Ahmed Chamseddine	273	Python 3	2025-06-11 20:59:18
3	Peter Stauder	299	Python 3	2023-05-18 15:44:31
4	Nicholas Russell Saerang	432	Python 3	2023-08-22 21:14:26
5	Kelly Dance	436	Python 3	2022-09-06 05:19:01
6	Andreas Björklund	534	Python 3	2022-09-04 15:35:28
7	Hidden user	578	Python 3	2020-08-23 18:23:53
8	Thomas Bolf	589	Python 3	2025-03-15 20:11:12
9	Hrant Hovhannisyan	590	Python 3	2025-10-06 08:18:32
10	Lex Kilpatrick	606	Python 3	2025-03-16 04:52:38

#	User	Length	Language	Date
1	Muhammad Sohail	1377	Rust	2024-09-20 06:18:49
2	Mckinley Xie	2067	Rust	2025-03-13 06:04:13
3	Vincent Lagerros	10884	Rust	2024-08-08 20:18:39

#	User	Length	Language	Date
1	Hidden user	1232	Swift	2023-10-05 12:25:44

Solution running time distribution