Use divide and conquer strategy of algorithm by diving in 2-2 group like merge sort make tree where every level we dropping people by using logic of above post so root will be celebrity
On Thu, Sep 23, 2010 at 11:26 AM, kartheek muthyala <kartheek0...@gmail.com>wrote: > Take 2 persons, suppose say A and B > ask one of them the question about other > if A Knows B, then A cannot be the celebrity, > if A does not know B, then B cannot be the celebrity. > add what remained to the remainder. > > repeat this process for the remaining n-1 until one or none remained. > > Then if it is none then there is no celebrity. > If there is one ask the question whether this person is known by remaining > n-1 and this person does n't know the remaining n-1. So a total of 3(n-1) > questions is used to determine the celeb. > > Time complexity is O(n). > > Repeat this for the remaining n-1 persons, if the remainder contain one > then > > > On Wed, Sep 22, 2010 at 9:37 PM, Divesh Dixit < > dixit.coolfrog.div...@gmail.com> wrote: > >> Among n people, a celebrity is defined as someone who is known to >> everyone, but who knows no >> one. Design and analyze to identify the celebrity, if one exists, by >> asking only questions of the >> following form: "Excuse me, do you know person x?" You will get a >> binary answer for each such >> question asked. Find the celebrity by asking only O(n) questions. >> >> -- >> 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. > -- Thanks & Regards Umesh kewat -- 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.
