@Sandeep: Without storing explicit pointer to last element, how would you be able to access last element in a Singly Linked List in O(1) ??? Is there any parallel data structure that needs to be maintained ?? and if it is larger than size of 2 explicit pointers to last and first elements then 2 pointer strategy is obviously better !!
On Tue, Jul 5, 2011 at 10:11 AM, Sandeep Jain <sandeep6...@gmail.com> wrote: > Its the queue in which you want to add a an element. > Small correction in the enqueue signature. > > void enqueue(NODEPTR &q, int data) // made it a reference, I missed it > > And the usage would be something like > NODEPTR myQueue = NULL; > > enqueue(myQueue, 10); > enqueue(myQueue, 20); > > cout<<deque(myQueue); > > > > Regards, > Sandeep Jain > > > > > > On Tue, Jul 5, 2011 at 8:30 AM, vaibhav agarwal < > vibhu.bitspil...@gmail.com> wrote: > >> @sandeep what is ptr q in case of enqueue? >> >> >> On Mon, Jul 4, 2011 at 12:53 PM, Sandeep Jain <sandeep6...@gmail.com>wrote: >> >>> How bout I say, the insertion and deletion functions have the following >>> prototype? >>> >>> void enqueue(NODEPTR q, int data) >>> int deque(NODEPTR q) >>> >>> You are not allowed to maintain two pointers, i.e. no front and no rare >>> pointers... >>> >>> >>> Regards, >>> Sandeep Jain >>> Member of Technical Staff, Adobe Systems, India >>> >>> >>> >>> >>> On Mon, Jul 4, 2011 at 10:20 PM, surender sanke <surend...@gmail.com>wrote: >>> >>>> always maintain front and rear pointers, updating them accordingly >>>> during insertion and deletion can achieve this in O(1) >>>> >>>> surender >>>> >>>> >>>> On Mon, Jul 4, 2011 at 9:59 PM, vaibhav shukla <vaibhav200...@gmail.com >>>> > wrote: >>>> >>>>> How to implement a QUEUE using a singly link list such that the >>>>> operations ENQUEUE and DEQUEUE takes O(1) time ? >>>>> >>>>> -- >>>>> best wishes!! >>>>> Vaibhav Shukla >>>>> >>>>> >>>>> -- >>>>> 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.
