Problem A
Birthday Party — Problem Statistics

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Submissions	10451
Accepted submissions	3179
Submission ratio	30.42%
Authors	2902
Accepted authors	2419
Author ratio	83.36%

#	User	Runtime	Language	Date
1	Raymond Yang	0.00 s	C	2021-10-16 04:53:02
2	Hidden user	0.00 s	C	2022-12-10 21:13:16
3	Anavi Vyawhare	0.00 s	C	2025-04-24 23:11:31
4	Hidden user	0.01 s	C	2022-12-08 01:56:47
5	Hidden user	0.01 s	C	2022-12-08 16:23:45
6	Sanjiv Dinakar	0.36 s	C	2023-04-29 17:45:17
7	Hidden user	0.47 s	C	2023-03-10 19:14:17
8	Wanghan Zhu	0.63 s	C	2024-06-12 13:53:29

#	User	Runtime	Language	Date
1	Fredrik Absalonsen	0.03 s	C#	2018-02-11 11:21:00
2	Kelvin Petry	0.03 s	C#	2019-06-17 14:15:44
3	Jayant Notani	0.04 s	C#	2020-04-05 06:29:48
4	Nathan Andrews	0.06 s	C#	2024-10-29 19:24:22

#	User	Runtime	Language	Date
1	Hidden user	0.03 s	Common Lisp	2019-08-07 01:22:40

#	User	Runtime	Language	Date
1	Yitian Wang	0.03 s	Go	2023-03-23 08:15:38
2	Norbert Voelker	0.08 s	Go	2021-12-08 21:17:15
3	Thomas Cole	0.10 s	Go	2024-03-22 04:39:28

#	User	Runtime	Language	Date
1	Birk Tjelmeland	0.01 s	Haskell	2018-01-24 17:21:00
2	Steinar Simonnes	0.01 s	Haskell	2025-08-11 14:09:25
3	nome	0.15 s	Haskell	2023-08-27 14:42:15
4	Morten Lohne	1.50 s	Haskell	2018-01-22 00:47:38

#	User	Runtime	Language	Date
1	José Vander Meulen	0.07 s	Java	2018-03-29 22:49:28
2	Vaibhav Pulastya	0.07 s	Java	2018-11-15 08:56:57
3	Mehdi Maick	0.07 s	Java	2018-12-12 20:05:41
4	Bjørn Dons	0.08 s	Java	2018-12-14 02:37:20
5	Rahul Ahuja	0.09 s	Java	2024-10-06 17:35:11
6	Magnus Øian	0.10 s	Java	2018-02-16 00:13:49
7	Øyvind Haarberg	0.11 s	Java	2016-09-28 22:15:48
8	James Black	0.11 s	Java	2017-10-27 06:07:28
9	Olivier Bourgeois	0.11 s	Java	2017-10-28 02:24:46
10	Kaja Dey	0.11 s	Java	2018-01-22 16:14:01

#	User	Runtime	Language	Date
1	Rachel Lader	1.28 s	JavaScript (Node.js)	2018-06-13 06:51:26

#	User	Runtime	Language	Date
1	Christian Cederquist	0.06 s	JavaScript (SpiderMonkey)	2023-06-29 22:43:25
2	Bjørn Chr. Soltvedt	0.45 s	JavaScript (SpiderMonkey)	2021-02-18 23:52:27
3	Zach Tschetter	1.46 s	JavaScript (SpiderMonkey)	2023-07-01 03:12:25

#	User	Runtime	Language	Date
1	Timothy Gaede	1.34 s	Julia	2025-04-13 08:49:57

#	User	Runtime	Language	Date
1	Phường Lên	0.23 s	Kotlin	2019-12-25 04:30:03
2	Hidden user	0.31 s	Kotlin	2018-01-24 16:20:47
3	Hidden user	0.33 s	Kotlin	2019-11-22 08:02:58
4	Ali M. Nekoh	0.34 s	Kotlin	2025-06-11 18:01:42
5	Luca Mueller	0.37 s	Kotlin	2024-10-25 23:05:00
6	Cheatahh	0.41 s	Kotlin	2025-06-14 14:10:07

#	User	Runtime	Language	Date
1	Sander de Haan	0.01 s	Lua	2025-04-13 14:26:14
2	Caleb Austin	0.75 s	Lua	2024-11-03 01:02:08

#	User	Runtime	Language	Date
1	Ida Bredal Skjørten	0.07 s	Python 2	2016-10-25 00:05:42
2	Agis Daniels	0.07 s	Python 2	2020-03-22 17:24:21
3	Hidden user	0.08 s	Python 2	2018-12-15 02:01:07
4	Andreas Björklund	0.09 s	Python 2	2020-11-16 18:28:54
5	Oskar Haarklou Veileborg	0.11 s	Python 2	2018-10-31 15:12:15
6	Haggai Liu	0.14 s	Python 2	2017-06-11 09:36:10
7	Bjørn Herting	0.24 s	Python 2	2016-09-28 19:21:57
8	Victor Zheng	0.30 s	Python 2	2017-06-17 20:50:58
9	Sondre Vestad	0.39 s	Python 2	2016-09-28 18:12:56
10	Ida Ryland	0.39 s	Python 2	2016-10-23 22:18:07

#	User	Runtime	Language	Date
1	mike	0.04 s	Python 3	2018-11-14 22:05:47
2	Ram Basnet	0.04 s	Python 3	2018-11-16 19:45:26
3	Gunvor Lemvik	0.05 s	Python 3	2018-01-27 12:45:58
4	Simon Halvorsen	0.05 s	Python 3	2018-05-07 16:47:40
5	Mark Thomas	0.05 s	Python 3	2019-07-16 00:08:25
6	Navya Zaveri	0.05 s	Python 3	2019-12-05 04:16:37
7	Yosuke Mizutani	0.05 s	Python 3	2019-12-28 10:38:31
8	卢欣逸	0.05 s	Python 3	2024-10-10 14:18:37
9	Thomas Olinger	0.05 s	Python 3	2024-10-29 23:07:30
10	Torstein Strømme	0.06 s	Python 3	2018-01-18 15:47:54

#	User	Runtime	Language	Date
1	Niklas Sandén	0.00 s	Rust	2023-03-08 18:21:50
2	Egor Kulikov	0.00 s	Rust	2025-01-14 16:48:57
3	Vincent Lagerros	0.00 s	Rust	2025-03-16 15:07:51
4	Eric Pinter	0.01 s	Rust	2020-10-13 02:51:48
5	Erik Magnusson	0.12 s	Rust	2024-02-06 18:13:49

#	User	Length	Language	Date
1	Wanghan Zhu	849	C	2024-06-12 13:53:29
2	Raymond Yang	1051	C	2021-10-16 04:53:02
3	Hidden user	1251	C	2023-03-10 19:14:17
4	Hidden user	1329	C	2022-12-10 21:13:16
5	Hidden user	1801	C	2022-12-08 16:23:45
6	Hidden user	1964	C	2022-12-08 02:10:45
7	Anavi Vyawhare	2180	C	2025-04-24 23:11:31
8	Sanjiv Dinakar	3484	C	2023-04-29 17:45:17

#	User	Length	Language	Date
1	Nathan Andrews	2037	C#	2024-10-29 19:24:22
2	Fredrik Absalonsen	2913	C#	2018-02-11 11:21:00
3	Kelvin Petry	3426	C#	2019-06-19 11:36:19
4	Jayant Notani	3523	C#	2020-04-05 06:29:48

#	User	Length	Language	Date
1	Buste Alin	489	C++	2025-08-26 21:24:15
2	Ronchen Luo	618	C++	2024-06-02 20:00:29
3	Đặng Xuân Minh Khôi	686	C++	2025-06-18 11:38:42
4	tushar sharma	737	C++	2021-03-01 22:30:13
5	芦义涵	765	C++	2025-04-08 01:35:14
6	MEV Alan	766	C++	2021-11-01 07:09:02
7	Hidden user	769	C++	2017-07-25 21:26:21
8	Hidden user	769	C++	2017-07-25 21:27:16
9	Gaelan McMillan	773	C++	2023-03-05 18:06:42
10	Mohammad Shirali	773	C++	2023-09-08 15:45:27

#	User	Length	Language	Date
1	Hidden user	1541	Common Lisp	2019-08-07 01:22:40

#	User	Length	Language	Date
1	Thomas Cole	2211	Go	2024-03-22 04:39:28
2	Yitian Wang	2271	Go	2023-03-23 08:15:38
3	Norbert Voelker	4616	Go	2021-12-08 21:17:15

#	User	Length	Language	Date
1	Birk Tjelmeland	1459	Haskell	2018-01-24 17:21:00
2	Morten Lohne	1904	Haskell	2018-01-22 16:18:49
3	Steinar Simonnes	2997	Haskell	2025-08-11 14:09:25
4	nome	6816	Haskell	2023-08-27 14:42:15

#	User	Length	Language	Date
1	Benedikt Nork	1155	Java	2018-06-11 23:25:06
2	Arham Khan	1179	Java	2024-05-09 22:40:37
3	Duncan Page	1317	Java	2018-03-27 00:24:40
4	Zoe Xue	1353	Java	2023-11-01 13:25:09
5	Venkatasai Gudisa	1401	Java	2022-07-11 20:45:48
6	Nathan Zhang	1403	Java	2022-11-09 03:19:04
7	Thomas King	1424	Java	2019-10-09 20:11:04
8	Ken Zheng	1442	Java	2023-03-04 00:48:30
9	Matthew Sun Sun	1486	Java	2023-12-25 23:48:37
10	Blue Bob	1488	Java	2024-12-28 19:37:22

#	User	Length	Language	Date
1	Rachel Lader	2035	JavaScript (Node.js)	2018-06-13 06:51:26

#	User	Length	Language	Date
1	Zach Tschetter	1010	JavaScript (SpiderMonkey)	2023-07-01 03:12:25
2	Christian Cederquist	2320	JavaScript (SpiderMonkey)	2023-06-29 22:43:25
3	Bjørn Chr. Soltvedt	19613	JavaScript (SpiderMonkey)	2021-02-18 23:52:27

#	User	Length	Language	Date
1	Timothy Gaede	1677	Julia	2025-04-13 08:49:57

#	User	Length	Language	Date
1	Ali M. Nekoh	1254	Kotlin	2025-06-11 18:01:42
2	Cheatahh	1410	Kotlin	2025-06-14 14:10:07
3	Hidden user	1633	Kotlin	2019-11-22 08:02:58
4	Luca Mueller	1691	Kotlin	2024-10-25 23:05:00
5	Phường Lên	1823	Kotlin	2019-12-25 04:30:03
6	Hidden user	4142	Kotlin	2018-01-24 16:20:47

#	User	Length	Language	Date
1	Sander de Haan	1466	Lua	2025-04-13 14:26:14
2	Caleb Austin	2106	Lua	2024-11-03 01:02:08

#	User	Length	Language	Date
1	Oskar Haarklou Veileborg	549	Python 2	2018-10-31 14:59:54
2	Andreas Björklund	712	Python 2	2020-11-16 18:28:54
3	Haggai Liu	760	Python 2	2017-06-11 09:36:10
4	Victor Zheng	764	Python 2	2017-06-17 20:50:58
5	Maj Stenmark	825	Python 2	2020-09-08 20:20:26
6	Lars Åström	859	Python 2	2018-06-25 22:15:51
7	Ida Ryland	885	Python 2	2016-10-23 22:18:07
8	Bjørn Herting	946	Python 2	2016-09-28 17:20:01
9	Sondre Vestad	946	Python 2	2016-09-28 18:12:56
10	Ida Bredal Skjørten	987	Python 2	2016-10-25 00:05:42

#	User	Length	Language	Date
1	Jimmy Xu	491	Python 3	2025-01-03 03:52:53
2	Kylind Reagan	497	Python 3	2024-08-23 00:55:11
3	Andrew Ferguson	642	Python 3	2022-06-19 00:41:31
4	Kelly Dance	644	Python 3	2022-09-12 06:12:59
5	Victor Song	671	Python 3	2024-02-06 17:50:06
6	Denis Molnar Ardelean	730	Python 3	2025-06-02 17:41:39
7	Nicholas Russell Saerang	737	Python 3	2023-10-24 11:50:00
8	Aarav Sh	743	Python 3	2025-04-06 04:44:20
9	omar Saifeldeen	751	Python 3	2024-11-07 13:35:41
10	Erik Adebahr	753	Python 3	2024-02-16 19:26:29

#	User	Length	Language	Date
1	Eric Pinter	4271	Rust	2020-10-13 02:51:48
2	Erik Magnusson	5041	Rust	2024-02-06 18:13:49
3	Niklas Sandén	27178	Rust	2023-03-08 18:21:50
4	Vincent Lagerros	43998	Rust	2025-03-16 15:07:51
5	Egor Kulikov	49330	Rust	2025-01-14 16:48:57

Solution running time distribution