sort the array using merge sort : order nlogn take the first element,subtract it with 'k' , then search the result using binary search in rest of the array : order nlogn hence u get two elements which sum up to K in order nlogn
On Mon, Jun 20, 2011 at 12:14 PM, Navneet Gupta <navneetn...@gmail.com>wrote: > Right, in the worst case, complexity with be O(2^N). > > So what are the possible optimizations here? Would building pre-computed > data structures with intermediate sum values help in finding such pairs in > less complexity? I think then we can apply dynamic programming to find such > pairs. > > > On Mon, Jun 20, 2011 at 12:09 PM, oppilas . <jatka.oppimi...@gmail.com>wrote: > >> I think its a NP problem. The solution complexity can go up O(2^N) in >> worst case. >> >> On Mon, Jun 20, 2011 at 11:55 AM, Navneet Gupta <navneetn...@gmail.com>wrote: >> >>> Given a set of integers , find a set of numbers such that they sum to a >>> given number k . >>> Notice the set of numbers can have 2 or more than 2 numbers. >>> >>> >>> --Navneet >>> >>> -- >>> 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. >> > > > > -- > --Navneet > > -- > 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. > -- best wishes!! Vaibhav Shukla DU-MCA -- 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.
