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Discussion of Problem 1625. Hankel MatrixDelyan Something is wrong with Check Program [8] // Problem 1625. Hankel Matrix 8 Oct 2008 06:26 I make matrices from the sequence of Catalan numbers 1,2,5,14,42,132,429,1430,4862,... Such matrices satisfy all criterion: 1)All numbers are positive integers 2) Determinants of all matrices are equal to 1 But I get WA2 svr Re: Something is wrong with Check Program // Problem 1625. Hankel Matrix 23 Oct 2008 10:06 I got AC using your method with first submission. Hanzbrow (TNU) KCC Re: Something is wrong with Check Program [3] // Problem 1625. Hankel Matrix 10 Aug 2009 15:27 Edited by author 10.08.2009 18:08 KALO Re: Something is wrong with Check Program [2] // Problem 1625. Hankel Matrix 28 Aug 2009 04:54 Use big numbers... Crash_access_violation Re: Something is wrong with Check Program [1] // Problem 1625. Hankel Matrix 11 Nov 2009 21:43 I use your method, but I got wa6. :( please help me. Edited by author 11.11.2009 21:43 Crash_access_violation Admins please check the problem // Problem 1625. Hankel Matrix 23 Nov 2009 03:29 Artem Khizha Re: Something is wrong with Check Program [1] // Problem 1625. Hankel Matrix 25 Apr 2010 03:00 Wow, its great, but how did you get to Catalan's numbers? Crash_access_violation Re: Something is wrong with Check Program // Problem 1625. Hankel Matrix 5 Jul 2010 21:42 please said me, what answer when n=20? thanks Vit Demidenko Re: Something is wrong with Check Program // Problem 1625. Hankel Matrix 13 Feb 2014 16:45 burn in hell with you spoiler Sergey Filipkov My bad... // Problem 1625. Hankel Matrix 3 Aug 2013 03:36 Edited by author 03.08.2013 03:37 DEF Is it correct hankel matrix? [2] // Problem 1625. Hankel Matrix 29 Aug 2008 20:40 | 0 1 1 | | 1 1 1 | = 1 | 1 1 0 | Is it correct hankel matrix and answer for n = 3? [SPbSU ITMO] WiNGeR Re: Is it correct hankel matrix? [1] // Problem 1625. Hankel Matrix 29 Aug 2008 22:14 It is a Hankel matrix, but is not answer, because |0| == 0 != 1 and | 0 1 | | 1 1 | == -1 != 1 DEF Re: Is it correct hankel matrix? // Problem 1625. Hankel Matrix 5 Sep 2008 03:19 Thank you for answer! I did not notice some conditions... LSBG Can we have negative numbers in the matrix? [4] // Problem 1625. Hankel Matrix 17 Aug 2008 15:56 Edited by author 17.08.2008 16:05 LSBG Re: Can we have negative numbers in the matrix? // Problem 1625. Hankel Matrix 17 Aug 2008 16:14 Apparently we are not allowed to use negative numbers. Vladimir Yakovlev (USU) Problem statement has been updated, you are to find a solution with positive numbers only [2] // Problem 1625. Hankel Matrix 17 Aug 2008 16:14 Denis Koshman Re: Problem statement has been updated, you are to find a solution with positive numbers only [1] // Problem 1625. Hankel Matrix 31 Aug 2008 18:14 non-negative Vladimir Yakovlev (USU) Re: Problem statement has been updated, you are to find a solution with positive numbers only // Problem 1625. Hankel Matrix 1 Sep 2008 02:06 Denis Koshman wrote 31 August 2008 18:14 non-negative The statement was updated twice. The last edit described here: http://acm.timus.ru/forum/thread.aspx?id=20926TJU_HighRP There is something wrong with the Check Program, [2] // Problem 1625. Hankel Matrix 18 Aug 2008 15:04 In the problem description we know that all output should be positive integers.But I submit a solution which contains '0' but it got accepted.I think the Check Program has something wrong. Sandro (USU) 0 is OK. Statement is updated. [1] // Problem 1625. Hankel Matrix 18 Aug 2008 15:05 Al.Cash Re: 0 is OK. Statement is updated. // Problem 1625. Hankel Matrix 18 Aug 2008 16:22 Statement isn't fully updated: Output positive integers α1, α2, …, α2n−1 ... But they must be only non-negative!
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