@yogesh, yes you are right. It is not an array, but an abstraact data type which supports, insertion with index.
On Tue, Sep 20, 2011 at 5:18 PM, Yogesh Yadav <medu...@gmail.com> wrote: > @saurabh: > > i think may be u left some part of question to mention... the array may be > a heap array ... > > or if the ques is correct then i don't think this sum can be possible in > O(log n) for previously existing array... > > may be we have to make array from start...then as you mention we can use > another array s[] as > > s[i]=s[i-1]+a[i]; > > for each addition in a[i] we will add s[i] as above then it can be possible > in O(1)... > > If i am wrong and it can be possible in O(log n) then plz tell.... > > .... > > On Tue, Sep 20, 2011 at 3:28 PM, saurabh agrawal <saurabh...@gmail.com>wrote: > >> Design an algorithm to perform operation on an array >> Add(i,y)-> add value y to i position >> sum(i) -> sum of first i numbers >> we can use additional array O(n) and worst case performance should be >> O(log n) for both operation >> >> -- >> 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.
