May be you can consider creating a 2d array to pre process and store all the rectangle sums as a dependent subproblem, the sum of larger rect will be currValuesAdded+OldRectSum. So when you get the coordinate as input u can calc the needed sum by subtracting sum of big rect and small rect which is not included in the given coordinates. This can be called constant time if u don't include the preprocessing time.
On Sat, Aug 11, 2012 at 9:57 PM, adarsh kumar <algog...@gmail.com> wrote: > Sum of the integers meaning? Do you mind giving an example test case? > > regards. > > On Sat, Aug 11, 2012 at 7:10 PM, Srividhya <srisam261...@gmail.com> wrote: > >> hi all:) >> >> The coordinates of a rectangle will be specified. there is a matrix of >> integers. yo should find the sum of the integers that fall in the region >> specified by the coordinates . >> >> The solution to be in constant time . >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To view this discussion on the web visit >> https://groups.google.com/d/msg/algogeeks/-/qHSmXBshmS4J. >> 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. > -- Cheers, Vicky -- 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.
