Problem A
Black Friday — Problem Statistics

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Submissions	2643
Accepted submissions	622
Submission ratio	23.53%
Authors	705
Accepted authors	567
Author ratio	80.43%

#	User	Runtime	Language	Date
1	Wanting XU	0.00 s	C	2015-12-09 05:31:46
2	Xueyin Wang	0.00 s	C	2016-01-03 20:04:21
3	Hidden user	0.00 s	C	2017-09-06 20:47:31
4	Hidden user	0.00 s	C	2018-09-15 19:58:17
5	Eric Chandler	0.00 s	C	2020-09-22 19:26:49

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	Java	2016-08-02 05:25:12
2	Rohith Kumar	0.06 s	Java	2020-07-30 13:27:00
3	Hidden user	0.07 s	Java	2016-08-09 20:10:50
4	Hidden user	0.07 s	Java	2016-09-08 23:51:20
5	Hidden user	0.07 s	Java	2016-09-15 06:08:09
6	Hidden user	0.07 s	Java	2017-03-17 00:59:01
7	Hidden user	0.07 s	Java	2017-03-22 22:00:08
8	Hidden user	0.07 s	Java	2017-08-17 22:04:54
9	Hidden user	0.07 s	Java	2017-08-18 07:25:22
10	Hidden user	0.07 s	Java	2017-09-02 12:50:48

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Python 2	2016-09-15 06:28:47
2	Hidden user	0.02 s	Python 2	2017-08-10 18:40:17
3	Hidden user	0.03 s	Python 2	2017-07-23 19:49:59
4	Hidden user	0.03 s	Python 2	2018-05-12 14:19:02
5	John Sangyeob Kim	0.03 s	Python 2	2021-06-16 02:54:37

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Python 3	2015-11-25 18:13:58
2	Emily Webber	0.02 s	Python 3	2015-11-26 16:35:14
3	Maria Smith	0.02 s	Python 3	2015-11-26 18:28:06
4	Jaewon Yoon	0.02 s	Python 3	2015-11-27 03:33:49
5	Gareth Jones	0.02 s	Python 3	2015-11-27 22:45:18
6	Seth August	0.02 s	Python 3	2015-11-28 04:00:32
7	Danylo Lavrentovich	0.02 s	Python 3	2015-11-29 03:55:36
8	Shelby Mahaffie	0.02 s	Python 3	2015-11-29 06:01:11
9	Anna Hazard	0.02 s	Python 3	2015-11-29 06:36:38
10	Hidden user	0.02 s	Python 3	2015-11-29 07:19:06

#	User	Length	Language	Date
1	Hidden user	424	C	2017-09-06 20:47:31
2	Xueyin Wang	441	C	2016-01-03 20:04:21
3	Hidden user	599	C	2018-09-15 19:58:17
4	Wanting XU	845	C	2015-12-09 05:31:46
5	Eric Chandler	1008	C	2020-09-22 19:26:49

#	User	Length	Language	Date
1	Hidden user	428	C++	2019-09-06 02:49:27
2	Qixin Zhu	448	C++	2015-12-16 21:38:11
3	Hidden user	452	C++	2017-09-13 18:40:24
4	Hidden user	490	C++	2017-08-02 10:54:40
5	Hidden user	597	C++	2017-09-07 23:28:28
6	Hidden user	667	C++	2016-09-12 14:16:04
7	Hidden user	691	C++	2019-09-16 00:32:39
8	Mei Yang	710	C++	2016-09-11 05:28:23
9	Hidden user	735	C++	2016-08-27 23:34:38
10	David Lee	770	C++	2016-09-05 21:37:16

#	User	Length	Language	Date
1	Fumi Yoshikoshi	457	Java	2020-08-07 11:11:04
2	Hidden user	470	Java	2016-09-15 06:08:09
3	Hidden user	547	Java	2017-09-02 12:50:48
4	Hidden user	576	Java	2017-08-18 07:25:22
5	Hidden user	623	Java	2017-03-22 22:00:08
6	Hidden user	653	Java	2017-03-17 00:59:01
7	Hidden user	912	Java	2017-08-17 22:04:54
8	Hidden user	993	Java	2016-09-08 23:51:20
9	Hidden user	1057	Java	2016-08-02 05:25:12
10	Rohith Kumar	1240	Java	2020-07-30 13:27:00

#	User	Length	Language	Date
1	Hidden user	373	Python 2	2016-09-15 06:28:47
2	Hidden user	428	Python 2	2017-08-10 18:40:17
3	John Sangyeob Kim	487	Python 2	2021-06-16 02:54:37
4	Hidden user	524	Python 2	2017-07-23 19:49:59
5	Hidden user	633	Python 2	2018-05-12 14:19:02

#	User	Length	Language	Date
1	Hidden user	206	Python 3	2017-06-12 05:44:31
2	Hidden user	217	Python 3	2020-08-03 12:28:03
3	Naganithin Manne	231	Python 3	2019-07-29 13:27:02
4	Hidden user	244	Python 3	2020-09-06 10:22:42
5	Hidden user	252	Python 3	2018-02-21 05:53:07
6	Hidden user	263	Python 3	2017-01-04 06:57:40
7	Hidden user	277	Python 3	2018-09-16 05:39:43
8	Jiehan Liu	282	Python 3	2021-09-03 11:00:32
9	Srinivasa Kasyap Munukutla	292	Python 3	2020-08-25 02:37:42
10	Hidden user	307	Python 3	2018-09-16 23:57:07

Solution running time distribution