Problem A
Leapfrog — Problem Statistics

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Submissions	306
Accepted submissions	79
Submission ratio	25.82%
Authors	81
Accepted authors	61
Author ratio	75.31%

#	User	Runtime	Language	Date
1	Ivan Petrov	0.45 s	C	2019-10-03 13:52:52

#	User	Runtime	Language	Date
1	Nick Wu	0.00 s	C++	2025-08-28 18:44:16
2	Osman Jimenez	0.02 s	C++	2018-08-23 22:13:07
3	Constantijn Dekker	0.02 s	C++	2021-03-30 19:45:37
4	boidoid	0.02 s	C++	2022-11-26 11:15:01
5	Jeremy Lim	0.02 s	C++	2024-12-21 11:24:24
6	Gertjan Kloosterman	0.03 s	C++	2018-06-23 08:51:23
7	Mårten Wiman	0.08 s	C++	2017-10-24 17:48:13
8	Rishi Sankar	0.08 s	C++	2021-03-31 21:57:30
9	Nils Gustafsson	0.09 s	C++	2017-10-24 19:26:32
10	Ludo Pulles	0.09 s	C++	2017-11-06 01:16:42

#	User	Runtime	Language	Date
1	Sander van Schouwenburg	0.25 s	Java	2017-10-25 13:26:10
2	Graeme Zinck	0.25 s	Java	2019-02-27 17:09:56
3	Suhas T. Nagar	1.47 s	Java	2022-11-21 05:02:00
4	Darrin Wiley	1.65 s	Java	2018-09-15 08:44:51
5	Hidden user	1.77 s	Java	2022-05-01 08:44:02

#	User	Runtime	Language	Date
1	Andreas Björklund	0.39 s	Python 2	2020-08-26 18:02:56
2	Måns Magnusson	0.57 s	Python 2	2018-06-27 01:30:55
3	Isaac Lee	0.90 s	Python 2	2019-02-01 21:46:49
4	Hermon Mulat	1.44 s	Python 2	2018-12-31 04:33:52

#	User	Runtime	Language	Date
1	Caleb Dastrup	0.62 s	Python 3	2024-08-03 19:07:31
2	Kelly Dance	0.77 s	Python 3	2024-08-03 20:09:11
3	Vincent Koppen	1.00 s	Python 3	2020-06-02 12:30:36
4	Shashank Bhatt	1.14 s	Python 3	2024-08-03 21:53:15
5	Duoduo Zhao	1.61 s	Python 3	2025-08-21 01:36:00
6	Erik Buis	1.66 s	Python 3	2022-04-02 22:49:22
7	Måns Magnusson	1.68 s	Python 3	2018-06-27 01:29:10

#	User	Length	Language	Date
1	Ivan Petrov	14806	C	2019-10-03 13:52:52

#	User	Length	Language	Date
1	Thomas Beuman	1404	C++	2017-10-25 14:01:16
2	Jeremy Lim	1521	C++	2024-12-21 11:24:24
3	Paul Wild	1524	C++	2020-07-31 17:08:15
4	Mindaugas Kazlauskas	1603	C++	2021-02-26 14:02:12
5	Ragur Krishnan	1715	C++	2018-08-15 19:30:42
6	Arvin Ding	1754	C++	2022-11-24 16:01:21
7	Johan Sannemo	1803	C++	2021-03-31 12:52:22
8	Lawry Sorenson	1820	C++	2024-08-03 18:28:58
9	Mårten Wiman	1823	C++	2017-10-24 17:48:13
10	Josenildo Silva	1882	C++	2018-05-06 17:38:18

#	User	Length	Language	Date
1	Hidden user	3359	Java	2022-05-01 08:44:02
2	Darrin Wiley	3552	Java	2018-09-15 08:44:51
3	Suhas T. Nagar	4035	Java	2022-11-21 05:02:00
4	Sander van Schouwenburg	4324	Java	2017-10-25 13:26:10
5	Graeme Zinck	6135	Java	2019-02-27 17:09:56

#	User	Length	Language	Date
1	Andreas Björklund	1583	Python 2	2020-08-26 18:02:56
2	Hermon Mulat	1660	Python 2	2018-12-31 04:37:42
3	Måns Magnusson	1703	Python 2	2018-06-27 01:30:55
4	Isaac Lee	3630	Python 2	2019-02-01 21:46:49

#	User	Length	Language	Date
1	Kelly Dance	903	Python 3	2024-08-03 20:09:11
2	Caleb Dastrup	1139	Python 3	2024-08-03 19:07:31
3	Vincent Koppen	1640	Python 3	2020-06-02 12:30:36
4	Måns Magnusson	1772	Python 3	2018-06-27 01:29:10
5	Erik Buis	2157	Python 3	2022-04-02 22:55:51
6	Duoduo Zhao	3241	Python 3	2025-08-21 01:36:00
7	Shashank Bhatt	13816	Python 3	2024-08-03 21:53:15

Solution running time distribution