Problem A
Nice Prefixes — Problem Statistics

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Submissions	116
Accepted submissions	20
Submission ratio	17.24%
Authors	32
Full solves [?]	16
Full solve Ratio	50.00%

#	User	Runtime	Language	Date
1	Ivan Petrov	0.04 s	C	2019-06-20 08:54:47

#	User	Runtime	Language	Date
1	Simon Lindholm	0.02 s	C++	2014-03-25 19:45:19
2	Alexander Skidanov	0.02 s	C++	2024-11-20 13:51:06
3	Rumman Mahmud	0.02 s	C++	2025-06-29 12:20:55
4	Tianyu Zhang	0.04 s	C++	2017-11-30 08:00:00
5	Josenildo Silva	0.04 s	C++	2018-06-18 03:33:33
6	Jeremy Lim	0.04 s	C++	2024-12-01 15:42:28
7	Lawry Sorenson	0.09 s	C++	2025-01-14 00:07:06
8	Sabit Zahin	0.13 s	C++	2017-01-26 23:27:18
9	Antonio Molina Lovett	0.19 s	C++	2017-11-09 19:09:36
10	Brandon Zhang	0.42 s	C++	2019-06-21 02:12:31

#	User	Runtime	Language	Date
1	Caleb Dastrup	0.33 s	Python 3	2025-01-18 00:09:35

#	User	Length	Language	Date
1	Ivan Petrov	2145	C	2019-06-20 08:54:47

#	User	Length	Language	Date
1	Alexander Skidanov	1631	C++	2024-11-20 14:58:29
2	Josenildo Silva	1786	C++	2018-06-18 03:33:33
3	Robert Cummings	1913	C++	2018-06-16 04:36:44
4	Simon Lindholm	2056	C++	2014-03-25 19:45:19
5	Jeremy Lim	2226	C++	2024-12-01 15:42:28
6	Johan Sannemo	2245	C++	2021-04-01 10:23:28
7	Lawry Sorenson	2255	C++	2025-01-14 00:07:06
8	Tianyu Zhang	2311	C++	2017-11-30 08:00:00
9	Brandon Zhang	4013	C++	2019-06-21 02:12:31
10	joão malheiros	4945	C++	2022-03-25 01:15:08

#	User	Length	Language	Date
1	Caleb Dastrup	1426	Python 3	2025-01-17 22:29:32

Solution running time distribution