Problem A
Parent Gap — Problem Statistics

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Submissions	991
Accepted submissions	470
Submission ratio	47.43%
Authors	422
Full solves [?]	371
Full solve Ratio	87.91%

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.01 s	Bash	2025-09-12 16:22:08

#	User	Runtime	Language	Date
1	Naveen Kumar S	0.00 s	C	2025-05-10 14:38:21

#	User	Runtime	Language	Date
1	Yuwono Bangun Nagoro	0.02 s	C#	2022-12-03 14:37:11
2	Michael Damsgaard	0.05 s	C#	2025-01-02 19:36:58

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.03 s	F#	2022-11-16 19:11:17

#	User	Runtime	Language	Date
1	Norbert Voelker	0.02 s	Go	2022-10-09 00:19:10

#	User	Runtime	Language	Date
1	Sachin Sivakumar	0.06 s	Java	2022-10-01 18:46:59
2	Sven Rönnbäck	0.06 s	Java	2022-12-17 22:28:51
3	Maximilliano Utomo Quok	0.06 s	Java	2023-01-02 16:11:38
4	Liam Keliher	0.06 s	Java	2023-08-17 02:17:06
5	Ben Cobb	0.06 s	Java	2023-12-13 05:38:46
6	Gao Tianrun	0.06 s	Java	2024-02-16 12:58:45
7	Mack Wong Yoong Yee	0.06 s	Java	2024-02-23 11:46:34
8	Crystal Sharpe	0.07 s	Java	2023-01-17 23:07:05
9	Darko Aleksic	0.09 s	Java	2022-10-01 18:46:21
10	Mong-En Ip	0.09 s	Java	2022-10-01 18:48:31

#	User	Runtime	Language	Date
1	Aaron Michael	0.05 s	JavaScript (Node.js)	2025-01-02 20:14:40
2	Bas Dirks	0.09 s	JavaScript (Node.js)	2022-11-21 13:17:04
3	Ryan Tan	0.09 s	JavaScript (Node.js)	2023-01-09 17:52:31

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2022-10-11 07:27:30
2	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-03-17 15:44:13

#	User	Runtime	Language	Date
1	Timothy Gaede	0.32 s	Julia	2024-06-02 09:22:05

#	User	Runtime	Language	Date
1	Adam Rankin	0.16 s	Kotlin	2023-05-08 19:49:02
2	Chris Johnson	0.22 s	Kotlin	2024-09-28 02:15:41

#	User	Runtime	Language	Date
1	Thomas Draper	0.02 s	Python 2	2022-10-22 01:39:05
2	Johan Lyts	0.02 s	Python 2	2022-10-22 14:09:05
3	Joseph Scholl	0.03 s	Python 2	2022-10-22 03:16:18

#	User	Runtime	Language	Date
1	Måns Magnusson	0.04 s	Python 3	2022-10-01 18:08:19
2	Dilhan Salgado	0.04 s	Python 3	2022-10-01 18:09:16
3	Oskar Haarklou Veileborg	0.04 s	Python 3	2022-10-01 18:18:14
4	Dorian Cauwe	0.04 s	Python 3	2022-10-01 18:21:49
5	Jason Cannon	0.04 s	Python 3	2022-10-01 18:23:44
6	Thomas Li	0.04 s	Python 3	2022-10-01 18:24:30
7	Jerry Xiong	0.04 s	Python 3	2022-10-01 18:24:53
8	Noble Mushtak	0.04 s	Python 3	2022-10-01 18:25:08
9	Vương Thiện Trung	0.04 s	Python 3	2022-10-01 18:33:06
10	Sebastian Boldsen Jakobsen	0.04 s	Python 3	2022-10-01 18:33:42

#	User	Runtime	Language	Date
1	Thomas Draper	0.06 s	Ruby	2022-10-22 02:09:15
2	Thomas Feld	0.06 s	Ruby	2022-12-12 10:52:04

#	User	Runtime	Language	Date
1	Brennan Craig	0.00 s	Rust	2024-09-27 23:16:51

#	User	Runtime	Language	Date
1	Bryce Wendling	0.04 s	Visual Basic	2024-03-30 21:58:43

#	User	Length	Language	Date
1	Chenzhang Hu	47	Bash	2025-09-13 17:00:51

#	User	Length	Language	Date
1	Naveen Kumar S	887	C	2025-05-10 14:38:21

#	User	Length	Language	Date
1	Michael Damsgaard	652	C#	2025-01-02 19:36:58
2	Yuwono Bangun Nagoro	1388	C#	2022-12-03 14:37:11

#	User	Length	Language	Date
1	Lee Zheng Han	196	C++	2023-01-07 18:20:45
2	Hyunjun Lee	302	C++	2023-05-05 04:56:58
3	Dexter Kwan	330	C++	2023-01-05 03:29:00
4	Jeffrey Lee	348	C++	2023-01-02 15:26:37
5	Christian Yongwhan Lim	354	C++	2023-06-15 01:45:53
6	Nicholas Jimmy Alden	373	C++	2023-01-03 10:08:02
7	Noel Roemmele	407	C++	2022-10-01 19:04:17
8	Pedro Grisi Oliveira de Queiroz	408	C++	2022-10-01 19:07:17
9	Dmitry Lyubshin	413	C++	2023-04-07 19:59:11
10	Tùng Hoàng Lâm	436	C++	2024-10-25 19:25:49

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	740	F#	2022-11-16 19:11:17

#	User	Length	Language	Date
1	Norbert Voelker	1109	Go	2022-10-09 00:19:10

#	User	Length	Language	Date
1	Nicholas Rolland	494	Java	2022-10-01 20:20:41
2	Mack Wong Yoong Yee	589	Java	2024-02-23 11:46:34
3	Logan Pipes	592	Java	2022-10-01 19:02:49
4	Sawyer Stanley	592	Java	2022-12-23 00:37:41
5	Isaac Mammel	594	Java	2024-01-20 23:25:21
6	Harim Jin	677	Java	2022-10-01 20:24:16
7	Josh Henderson	720	Java	2022-10-01 20:13:25
8	Andy Hsi	749	Java	2025-04-15 20:50:31
9	Doug Goodman	864	Java	2022-10-09 19:10:30
10	Ben Cobb	864	Java	2023-12-13 05:38:46

#	User	Length	Language	Date
1	Ryan Tan	384	JavaScript (Node.js)	2023-01-09 17:52:31
2	Bas Dirks	1014	JavaScript (Node.js)	2022-11-21 13:17:04
3	Aaron Michael	1258	JavaScript (Node.js)	2025-01-02 20:14:40

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	354	JavaScript (SpiderMonkey)	2022-10-11 16:11:43
2	Christian Pilegaard Cederquist	825	JavaScript (SpiderMonkey)	2023-03-17 15:44:13

#	User	Length	Language	Date
1	Timothy Gaede	278	Julia	2024-06-02 09:22:05

#	User	Length	Language	Date
1	Chris Johnson	327	Kotlin	2024-09-28 02:15:41
2	Adam Rankin	782	Kotlin	2023-05-08 19:49:02

#	User	Length	Language	Date
1	Thomas Draper	51	Python 2	2022-10-22 01:55:58
2	Joseph Scholl	60	Python 2	2022-10-22 03:38:04
3	Johan Lyts	109	Python 2	2022-10-22 14:16:53

#	User	Length	Language	Date
1	Thomas Draper	60	Python 3	2022-10-22 01:36:53
2	Joseph Scholl	69	Python 3	2022-10-22 01:58:48
3	Lee Isaac	69	Python 3	2022-11-06 20:52:18
4	Kevin Kinney	77	Python 3	2022-10-21 05:30:39
5	Peter Stauder	82	Python 3	2022-10-08 15:09:18
6	Lawry Sorenson	83	Python 3	2022-10-21 21:36:46
7	Ahmed Chamseddine	94	Python 3	2025-01-01 07:18:48
8	Tan Wei Seng	98	Python 3	2023-01-03 13:59:54
9	Lee Zheng Han	103	Python 3	2023-01-07 18:31:02
10	Marcus Xu	109	Python 3	2023-01-03 20:33:59

#	User	Length	Language	Date
1	Thomas Feld	45	Ruby	2022-12-23 13:28:19
2	Thomas Draper	52	Ruby	2022-10-22 02:09:15

#	User	Length	Language	Date
1	Brennan Craig	2631	Rust	2024-09-27 23:16:51

#	User	Length	Language	Date
1	Bryce Wendling	1913	Visual Basic	2024-03-30 21:58:43

Solution running time distribution