http://en.m.wikipedia.org/wiki/Bell_number On 3 Apr 2012 05:04, "Luke Pebody" <[email protected]> wrote:
> > > Disregard > > On 3 Apr 2012, at 04:49, Luke Pebody <[email protected]> wrote: > > http://en.wikipedia.org/wiki/Catalan_number > > > > On 3 Apr 2012, at 03:35, vivek dhiman <[email protected]> wrote: > > Hi.. > > you are correct ...thanks.. it can be done using DP.. > and I did it :) > On Tue, Apr 3, 2012 at 1:48 AM, Carlos Guia <[email protected]>wrote: > >> Do you have a constrain on k? It can be done in O(k^2). >> >> Dp(p, k) would be the count the number of arrangements of size k of the >> previous number was p. >> The transitions aren't hard, there are at most three of them, you should >> be able to figure them out. >> >> If you need more help, let me know, however, trying it by yourself is the >> way to learn it. >> >> Is k^2 is too big, well I haven't given it enough thought to know if I >> can or cannot do it better. >> >> Regards, >> Carlos Guia >> On Apr 2, 2012 1:28 PM, "vivek dhiman" <[email protected]> wrote: >> >>> + I am only looking at the count.. >>> >>> for k=1 ans = 1 >>> k=2 ans = 2 >>> k=3 ans = 5 >>> k=4 ans = 14 I guess... >>> k = 5 ans =52 I guess >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Google Code Jam" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/google-code?hl=en. >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google Code Jam" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/google-code?hl=en. >> > > > > -- > Regards > Vivek Dhiman > > -- > You received this message because you are subscribed to the Google Groups > "Google Code Jam" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-code?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google Code Jam" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-code?hl=en.
