Problem A
Chatter — Problem Statistics

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Submissions	905
Accepted submissions	382
Submission ratio	42.21%
Authors	288
Full solves [?]	244
Full solve Ratio	84.72%

#	User	Runtime	Language	Date
1	John Barczynski	0.15 s	C	2018-01-25 00:29:26
2	Alexander Bilde Pedersen	0.15 s	C	2023-07-12 23:49:26
3	Bergur Snorrason	0.17 s	C	2019-10-25 18:36:33
4	Eyleifur Bjarkason	0.18 s	C	2019-10-25 23:37:40
5	Mirel Cosulschi	0.20 s	C	2025-04-13 22:33:21

#	User	Runtime	Language	Date
1	Alexander Kravberg	0.10 s	C++	2023-07-29 02:21:27
2	Armen Andreasyan	0.15 s	C++	2023-05-09 10:21:05
3	Kush Nayak	0.15 s	C++	2024-04-04 21:56:04
4	Noszály Csaba	0.15 s	C++	2025-03-01 16:43:45
5	Dmitry Lyubshin	0.16 s	C++	2018-07-06 02:41:24
6	Hidden user	0.17 s	C++	2017-06-26 09:01:26
7	Vincent Tandya	0.17 s	C++	2021-06-05 18:32:02
8	Hussein Taher	0.17 s	C++	2021-08-02 22:38:15
9	Stephen Lu	0.17 s	C++	2023-01-14 09:29:54
10	Andrew Polizzotto	0.17 s	C++	2023-03-10 20:29:36

#	User	Runtime	Language	Date
1	Ari Páll Agnarsson	1.75 s	Common Lisp	2021-02-25 22:21:57

#	User	Runtime	Language	Date
1	Hidden user	1.97 s	Haskell	2022-01-27 06:12:43

#	User	Runtime	Language	Date
1	Bjørn Dons	0.31 s	Java	2018-12-02 08:56:19
2	Sven Rönnbäck	0.39 s	Java	2023-08-12 13:19:33
3	Crystal Sharpe	0.51 s	Java	2020-05-17 23:52:50
4	Mohamed Faez Bin Shahlan	0.67 s	Java	2023-03-11 07:50:53
5	Liam Keliher	0.68 s	Java	2020-05-15 06:27:00
6	Olav Røthe Bakken	0.76 s	Java	2018-01-25 16:50:03
7	Eric Leow Yu Quan	0.86 s	Java	2021-04-29 06:44:17
8	Brent Yorgey	0.88 s	Java	2021-02-21 22:19:21
9	Finn Lidbetter	0.93 s	Java	2016-09-06 14:04:50
10	Steinar Logi Geirsson	0.94 s	Java	2021-02-22 23:07:22

#	User	Runtime	Language	Date
1	Robert M	1.63 s	Kotlin	2023-03-14 21:45:06

#	User	Runtime	Language	Date
1	Martin Jackson	0.68 s	Python 2	2016-07-29 04:33:40
2	John Barczynski	1.37 s	Python 2	2018-01-24 20:36:47
3	Kevin Tang	1.63 s	Python 2	2019-10-03 02:29:34

#	User	Runtime	Language	Date
1	Sivamurugan Velmurugan	0.65 s	Python 3	2025-11-08 19:25:37
2	Peter Ton	0.77 s	Python 3	2025-05-25 22:15:49
3	Sindri Unnsteinsson	0.80 s	Python 3	2021-02-25 20:02:35
4	Alex Liu	0.80 s	Python 3	2024-04-05 06:54:55
5	Rohan Potru	0.81 s	Python 3	2024-02-11 23:05:17
6	Ryan Tan	0.85 s	Python 3	2022-10-23 08:52:53
7	Prakhar Gandhi	0.86 s	Python 3	2023-09-05 09:20:39
8	Kevin Huang	0.87 s	Python 3	2024-04-05 04:32:24
9	Kelly Dance	0.88 s	Python 3	2023-04-20 03:38:11
10	Nicholas Russell Saerang	0.89 s	Python 3	2022-03-10 09:13:24

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.14 s	Rust	2025-07-12 14:49:50
2	Artur Khuziakhmetov	0.19 s	Rust	2025-11-17 11:25:12
3	Iker Lissarrague	0.46 s	Rust	2023-08-23 00:30:09
4	Lukas Dutrieux	0.62 s	Rust	2025-11-13 20:55:26

#	User	Length	Language	Date
1	Mirel Cosulschi	1598	C	2025-04-13 22:33:21
2	Alexander Bilde Pedersen	1643	C	2023-07-12 23:47:08
3	John Barczynski	2212	C	2018-01-25 00:29:26
4	Bergur Snorrason	2319	C	2021-02-17 11:01:54
5	Eyleifur Bjarkason	6711	C	2019-10-25 23:37:40

#	User	Length	Language	Date
1	Teikn Smith	611	C++	2024-08-30 01:36:38
2	Markus Mathiasen	892	C++	2021-11-04 09:12:51
3	Armen Andreasyan	970	C++	2023-05-09 10:21:05
4	Arnar Ágúst Kristjánsson	988	C++	2021-02-24 15:31:00
5	Johan Wind	996	C++	2019-02-06 00:44:04
6	Nikola Stojkovski	1023	C++	2024-06-13 10:21:46
7	Hidden user	1034	C++	2019-04-24 03:28:58
8	Hidden user	1070	C++	2024-02-11 20:24:08
9	Caeden Whitaker	1109	C++	2021-07-07 08:12:53
10	ZeroCool	1114	C++	2024-06-12 16:34:15

#	User	Length	Language	Date
1	Ari Páll Agnarsson	9634	Common Lisp	2021-02-25 23:27:12

#	User	Length	Language	Date
1	Hidden user	3746	Haskell	2022-01-27 06:12:43

#	User	Length	Language	Date
1	Hidden user	1531	Java	2016-04-21 01:39:58
2	Eric Leow Yu Quan	1591	Java	2021-04-29 06:44:17
3	Doug Goodman	1661	Java	2021-03-18 14:48:29
4	Crystal Sharpe	1759	Java	2020-05-17 23:52:50
5	Kevin Zhao	2406	Java	2024-02-11 20:39:17
6	Justin Chang	2789	Java	2024-02-11 22:46:34
7	Olav Røthe Bakken	2802	Java	2018-01-25 16:50:03
8	Steinar Logi Geirsson	2885	Java	2021-02-22 20:31:33
9	Finn Lidbetter	2918	Java	2016-09-06 14:04:50
10	Mohamed Faez Bin Shahlan	2993	Java	2023-03-11 07:50:53

#	User	Length	Language	Date
1	Robert M	2584	Kotlin	2023-03-14 21:45:06

#	User	Length	Language	Date
1	Kevin Tang	1165	Python 2	2019-10-03 02:29:34
2	Martin Jackson	1704	Python 2	2016-07-29 04:33:40
3	John Barczynski	2201	Python 2	2018-01-24 20:36:47

#	User	Length	Language	Date
1	Oskar Haarklou Veileborg	703	Python 3	2020-02-03 14:42:17
2	George Zhang	727	Python 3	2025-05-26 01:23:57
3	Kelly Dance	779	Python 3	2023-04-20 03:38:11
4	Iman Khodadi	1050	Python 3	2025-01-08 17:35:10
5	Sindri Unnsteinsson	1130	Python 3	2021-02-25 20:02:35
6	Blake Herrera	1201	Python 3	2022-11-20 05:44:29
7	Casper Rysgaard	1233	Python 3	2021-03-23 19:07:46
8	Gaelan McMillan	1368	Python 3	2025-05-25 22:43:22
9	Maxime Lemonnier	1388	Python 3	2021-11-18 08:34:41
10	Krishna Thirunavukkarasu	1433	Python 3	2025-11-07 22:17:31

#	User	Length	Language	Date
1	Artur Khuziakhmetov	1643	Rust	2025-11-18 06:53:47
2	Iker Lissarrague	2865	Rust	2023-08-23 00:30:09
3	Lukas Dutrieux	3393	Rust	2025-11-13 20:55:26
4	Vincent Lagerros	12714	Rust	2024-07-17 19:48:00

Solution running time distribution