O(nlogn) 1. precompute the minimum of [ i+1 ....N] and store in b[i] 2. Now do a binary search for a[i] in b[i+1] in the range of b[i+1..... N]
On Wed, Jul 27, 2011 at 12:27 PM, salvador_cerinza < vishwakarma.ii...@gmail.com> wrote: > Let say stack S. > 1.insert elements in S of A[] from right to left. > 2.int val = S.top(); > 3.S.pop(); > 4.now check val with S.top() until u find any element smaller than val. > 5.Note down the element pop it from stack > 6.if step 4 is true , the push val in stack S and all elements which were > popped in the order they were popped except the last matched candidate > element. > > Yeah..dis algo is not very efficient.. > > > On Wed, Jul 27, 2011 at 12:20 PM, Pankaj <jatka.oppimi...@gmail.com>wrote: > >> Can you please elaborate a little about your stack based solution. I was >> thinking of using queue but was unable to make a perfect algo. >> >> >> On Wed, Jul 27, 2011 at 12:18 PM, salvador_cerinza < >> vishwakarma.ii...@gmail.com> wrote: >> >>> i m suggesting stack not just for best case only . >>> >>> >>> On Wed, Jul 27, 2011 at 12:16 PM, Pankaj <jatka.oppimi...@gmail.com>wrote: >>> >>>> Even in array best case can be O(n). Why use stack? >>>> On Wed, Jul 27, 2011 at 12:14 PM, salvador_cerinza < >>>> vishwakarma.ii...@gmail.com> wrote: >>>> >>>>> Best case : O(n) >>>>> Worst case : O(n^2) >>>>> can be done using stack. >>>>> >>>>> Thinking of better solution. . >>>>> >>>>> >>>>> On Wed, Jul 27, 2011 at 11:50 AM, ankit sambyal < >>>>> ankitsamb...@gmail.com> wrote: >>>>> >>>>>> O(n^2) algo is trivial. Can anybody think of a better approach ??? >>>>>> >>>>>> -- >>>>>> 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. >>>> >>> >>> -- >>> 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. > -- regards, chinna. -- 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.
