Ah I see, in which case could you not generalise your solution for all integers? By taking into account the size of words on the computer for example?
On 5 December 2011 15:09, Dave <dave_and_da...@juno.com> wrote: > @Carl: Yes, as coded, my algorithm is for 32-bit integers. But the > original poster asked for a solution using bit manipulation, and > modulus and division are arithmetic operations, not bit operations. > > Dave > > On Dec 5, 8:56 am, Carl Barton <odysseus.ulys...@gmail.com> wrote: > > @Dave Yours only works for a certain subset of all possible powers or 3 > > doesn't it? So WgpShashank's would be more general? > > > > On 5 December 2011 14:30, Dave <dave_and_da...@juno.com> wrote: > > > > > > > > > @WgpShashank: Yours is an O(log n) solution. Mine is O(1). > > > > > Dave > > > > > On Dec 5, 6:21 am, WgpShashank <shashank7andr...@gmail.com> wrote: > > > > @SAMMM have a look > > > > > > * *solution is to keep dividing the number by 3, i.e, do n = n/3 > > > > iteratively. In any iteration, if n%3 becomes non-zero and n is not 1 > > > then > > > > n is not a power of 3, otherwise n is a power of 3 > > > > > > check it out ?http://codepad.org/863ptoBE > > > > > > Thanks > > > > Shashank > > > > Computer Science > > > > BIT Mesrahttp:// > > >www.facebook.com/wgpshashankhttp://shashank7s.blogspot.com/ > > > > > -- > > > You received this message because you are subscribed to the Google > Groups > > > "Algorithm Geeks" group. > > > To post to this group, send email to algogeeks@googlegroups.com. > > > To unsubscribe from this group, send email to > > > algogeeks+unsubscr...@googlegroups.com. > > > 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 algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > 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 algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
