Well for odd cases its lile this 1 ->2->3->4->5
4->5->2->3->1 Also u have to do this in single pass..U can use recursion though On Tue, Jan 24, 2012 at 12:18 AM, Arun Vishwanathan <[email protected]>wrote: > node *ptr =head; > > //function call is reverse(head,NULL) > > void reverse(node *ptr, node *follow) > { > if(ptr->next!=NULL && ptr->next->next!=NULL) > reverse(ptr->next->next,ptr); > else > if(ptr->next!=NULL && ptr->next->next==NULL) > { > ptr->next->next=follow; > head=ptr; > } > ptr->next->next=follow; > if(follow!=NULL) > follow->next->next=NULL; > } > > @ankur: if odd number of nodes then maybe just ask interviewer how he > wants it to be and try including that case ;) > > > } > > On Mon, Jan 23, 2012 at 10:32 AM, Ankur Garg <[email protected]> wrote: > >> wat if u have odd no of nodes >> >> >> >> On Tue, Jan 24, 2012 at 12:00 AM, atul anand <[email protected]>wrote: >> >>> one simple way would be using stacks. >>> push node,node->next; >>> then pop() , and reversing the pointers. >>> >>> On Mon, Jan 23, 2012 at 11:46 PM, Ankur Garg <[email protected]>wrote: >>> >>>> Say LL is >>>> >>>> 1->2->3->4->5->6->7->8 >>>> >>>> Then u need to return >>>> >>>> 7->8->5->6->3->4->1->2 >>>> >>>> U cant swap the values ....U have to rearrange the ptr... >>>> >>>> >>>> -- >>>> 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. >>>> >>> >>> -- >>> 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. >>> >> >> -- >> 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. >> > > > > -- > "People often say that motivation doesn't last. Well, neither does > bathing - that's why we recommend it daily." > > -- > 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. > -- 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.
