Using Wladimir's formulas, you have: F(0) + F(1) + F(2) + F(3) + F(4) + F(5) + F(6) + ... + F(3n-2) + F(3n-1) + F(3n) = F(3n+2) - 1 F(0) +(F(1) + F(2))+ F(3) +(F(4) + F(5))+ F(6) + ... +(F(3n-2) + F(3n-1))+ F(3n) = F(3n+2) - 1 F(0) + 2F(3) + 2F(6) + ... + 2F(3n) = F(3n+2) - 1
Since F(0) = 0, F(0) + F(3) + F(6) + ... + F(3n) = (F(3n+2) - 1)/2 Marcelo Menegali On Sun, Oct 2, 2011 at 2:10 AM, shady <[email protected]> wrote: > this is bruteforce. You are calculating all fib. numbers. > > > On Sun, Oct 2, 2011 at 10:38 AM, rahul sharma <[email protected]>wrote: > >> yea...first sol is brute force...but this is not..that is posted by >> akansha....i think...but not sure...the question wants only >> recursive....hoope sumone may come with sumthng new >> >> >> On Sun, Oct 2, 2011 at 10:35 AM, Siddhartha Banerjee < >> [email protected]> wrote: >> >>> there must be a non brute force approach too rite??? >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" 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/algogeeks?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" 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/algogeeks?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" 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/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" 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/algogeeks?hl=en.
