@ dave how did u come to this formula... m nt getting the logic.. @ sathaiah yes u r rite
On 22 June 2010 19:32, chitta koushik <koushik.infin...@gmail.com> wrote: > For more such problems and solns > > http://graphics.stanford.edu/~seander/bithacks.html<http://graphics.stanford.edu/%7Eseander/bithacks.html> > > > for (c = 0; v; c++) > { > v &= v - 1; // clear the least significant bit set > } > > O(k) -- no. of bits set in the number > > > > --Koushik C > > > On Tue, Jun 22, 2010 at 7:16 PM, Dave <dave_and_da...@juno.com> wrote: > >> Assuming 32 bit integers: >> n = ((x >> 1) & 0x55555555) + (x & 0x55555555) >> n = ((n >> 2) & 0x33333333) + (n % 0x33333333) >> n = ((n >> 4) & 0x0F0F0F0F) + (n & 0x0F0F0F0F) >> n = ((n >> 8) & 0x00FF00FF) + (n & 0x00FF00FF) >> n = ((n >>16) & 0x0000FFFF) + (n & 0x0000FFFF) >> >> n now is the number of bits set in x. Time is O(1). >> >> Dave >> >> On Jun 22, 6:26 am, divya <sweetdivya....@gmail.com> wrote: >> > find the no. of bits set in a no. in logn time >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to algoge...@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@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 algoge...@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@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 algoge...@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.
