@diamond sorry but how do we know the fast pointer is pointing to head again? u see, in case u dont have O(n) space to record visited nodes
On Sun, Mar 28, 2010 at 10:28 AM, blackDiamond <[email protected]>wrote: > vikrant you havent read properly the post by Gaurav when the second pointer > will come back to the head first will be pointing the middle.(Think it)!! > > > On Sun, Mar 28, 2010 at 10:21 AM, vikrant singh > <[email protected]>wrote: > >> Well gaurav, i think by this method you can only check for a cycle in the >> list. >> If u have any idea how can you implement this to solve originally posted >> problem? >> >> On Sat, Mar 27, 2010 at 9:03 AM, gaurav kishan <[email protected]>wrote: >> >>> Hi, >>> >>> Keep two pointers both initially pointing to Head. >>> Move first pointer one by one and the second pointer by two nodes in each >>> iteration. >>> When second pointer next link points to head again,return first pointer. >>> >>> Please let me know if this can be further imporved upon or there is some >>> fallacy in the approach. >>> >>> Regards, >>> Gaurav. >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]<algogeeks%[email protected]> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> >> >> -- >> Vikrant Singh >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<algogeeks%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > ~~~~BL/\CK_D!AMOND~~~~~~~~ > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<algogeeks%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- Vikrant Singh -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
