using parent pointers untill we reach to lca. On Fri, Jun 10, 2011 at 3:59 PM, aanchal goyal <goyal.aanch...@gmail.com>wrote:
> @sunny finding lca in logn is fine, but how can we traverse the path in > logn.. ? > > > On Fri, Jun 10, 2011 at 3:50 PM, sunny agrawal <sunny816.i...@gmail.com>wrote: > >> @ross if a parent pointer is there lca can be found in lgn >> and path can be traversed in lgn too >> why it cannot be lgn >> what is the problem ?? >> >> >> On Fri, Jun 10, 2011 at 3:06 PM, sunny agrawal >> <sunny816.i...@gmail.com>wrote: >> >>> thats why i mentioned x OR z and i m considering parent pointer :) >>> without parent pointer both solutions will be O(n) :) >>> >>> >>> On Fri, Jun 10, 2011 at 3:02 PM, Harshal <hc4...@gmail.com> wrote: >>> >>>> @Sunny >>>> I am assuming that the tree is rooted. There is no 'parent' pointer. >>>> A >>>> / \ >>>> B C* >>>> / \ >>>> D* F* >>>> / \ >>>> J K >>>> / \ >>>> M* >>>> >>>> suppose x=D, y=C, z=F >>>> According to you, finding the lca of x and z=> A >>>> Now y lies on path from lca to z, but it doesn't lie on path from x to >>>> z. Am I missing something? >>>> >>>> >>>> On Fri, Jun 10, 2011 at 2:50 PM, sunny agrawal <sunny816.i...@gmail.com >>>> > wrote: >>>> >>>>> but that will be O(n) i think >>>>> >>>>> >>>>> On Fri, Jun 10, 2011 at 2:38 PM, Harshal <hc4...@gmail.com> wrote: >>>>> >>>>>> can be solved using dfs. >>>>>> >>>>>> >>>>>> On Fri, Jun 10, 2011 at 2:27 PM, sunny agrawal < >>>>>> sunny816.i...@gmail.com> wrote: >>>>>> >>>>>>> find common Ancestor of both. see if y lies on path from x or z to >>>>>>> this ancestor >>>>>>> O(lgn) >>>>>>> >>>>>>> >>>>>>> On Fri, Jun 10, 2011 at 1:20 PM, aanchal goyal < >>>>>>> goyal.aanch...@gmail.com> wrote: >>>>>>> >>>>>>>> There is a binary tree(Not a BST) in which you are given three nodes >>>>>>>> x,y,z .Write a function which finds whether y lies in the path b/w x >>>>>>>> and z. >>>>>>>> >>>>>>>> -- >>>>>>>> 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. >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Sunny Aggrawal >>>>>>> B-Tech IV year,CSI >>>>>>> Indian Institute Of Technology,Roorkee >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> 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, >>>>>> III 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. >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Sunny Aggrawal >>>>> B-Tech IV year,CSI >>>>> Indian Institute Of Technology,Roorkee >>>>> >>>>> -- >>>>> 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, >>>> III 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. >>>> >>> >>> >>> >>> -- >>> Sunny Aggrawal >>> B-Tech IV year,CSI >>> Indian Institute Of Technology,Roorkee >>> >>> >> >> >> -- >> Sunny Aggrawal >> B-Tech IV year,CSI >> Indian Institute Of Technology,Roorkee >> >> -- >> 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. > -- Sunny Aggrawal B-Tech IV year,CSI Indian Institute Of Technology,Roorkee -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. 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