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A problem of Backtracking statistics & best solutions

Users accepted	Submissions	Accepted	Wrong Answer	Compile Error	Runtime Error	Time Limit Exceeded
539	3103	893	1001	324	100	552

RANK	DATE	USER	RESULT	TIME	MEM	LANG
1	2019-05-25 21:07:46	xwoter	accepted	0.00	16M	CPP14
2	2019-07-06 16:53:00	Jakube	accepted	0.00	15M	CPP14-CLANG
3	2020-04-16 11:33:01	Alexander Rass	accepted	0.00	4.4M	C++ 4.3.2
4	2017-10-15 13:37:27	ElChupacabra	accepted	0.01	15M	CPP14
5	2019-06-07 10:26:49	abcdefgh	accepted	0.01	15M	CPP14
6	2019-06-14 08:38:17	sumengfang	accepted	0.01	16M	CPP
7	2021-10-05 15:49:27	Bashem	accepted	0.01	5.2M	CPP14
8	2024-09-09 22:15:11	martins_	accepted	0.01	5.2M	CPP14
9	2024-10-22 23:53:02	near_crowd	accepted	0.01	5.2M	CPP14
10	2016-11-22 16:42:12	Yolanda Hertita	accepted	0.02	3.4M	CPP14
11	2018-12-14 13:07:10	sgtlaugh	accepted	0.02	27M	PYTHON3
12	2023-07-09 12:10:18	shivacharani16	accepted	0.02	5.3M	CPP14
13	2023-07-09 12:21:30	Jansen Ken Pegrasio	accepted	0.02	5.4M	CPP14
14	2023-07-09 12:34:24	Faishal Rabbani	accepted	0.02	5.3M	CPP14
15	2018-12-17 15:13:36	MOJ	accepted	0.03	16M	CPP14
16	2021-09-01 03:46:00	Lautaro Lasorsa	accepted	0.03	5.3M	CPP14-CLANG
17	2016-10-14 00:06:55	al	accepted	0.04	2.8M	C++ 4.3.2
18	2017-01-22 12:04:51	pipiman	accepted	0.04	2.1M	C
19	2018-08-25 20:51:20	Parth Kohli	accepted	0.04	15M	CPP14-CLANG
20	2018-11-17 12:37:59	vpinheiro38	accepted	0.04	2.7M	C++ 4.3.2