Doing binary search for index of first and last occurrences? I guess it is complex.
My suggestion is: Do a binary search to find x, once the location of x is found say at i. Do a check at ... i-2, i-1,i+1,i+2 .. until those values are equal to x. On Sun, Jun 19, 2011 at 12:11 PM, Harshal <hc4...@gmail.com> wrote: > :D > > > On Sun, Jun 19, 2011 at 12:09 PM, aanchal goyal > <goyal.aanch...@gmail.com>wrote: > >> oops!! I am feeling like banging my head on wall now :( . thanks nyways! >> >> >> On Sun, Jun 19, 2011 at 12:07 PM, Harshal <hc4...@gmail.com> wrote: >> >>> its simple. binary search for index of first and last occurence and >>> return its difference >>> >>> >>> On Sun, Jun 19, 2011 at 12:04 PM, aanchal goyal < >>> goyal.aanch...@gmail.com> wrote: >>> >>>> given a sorted array, how to find number of occurences of a number x in >>>> it in O(logn)? >>>> >>>> -- >>>> Regards,* >>>> Aanchal Goyal*. >>>> >>>> -- >>>> 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. >>>> >>> >>> >>> >>> -- >>> Harshal Choudhary, >>> Final Year B.Tech CSE, >>> NIT Surathkal, Karnataka, India. >>> >>> >>> >>> -- >>> 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. >>> >> >> >> >> -- >> Regards,* >> Aanchal Goyal*. >> >> -- >> 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. >> > > > > -- > Harshal Choudhary, > Final Year B.Tech CSE, > NIT Surathkal, Karnataka, India. > > > -- > 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.
