are u saying to use double in the loop to divide and multiply together....? or to use array to divide with one by which current value of (n-r+1) is divisible... ----------------------------------------- PRAMENDRA RATHI NIT ALLAHABAD
On Tue, Jun 21, 2011 at 3:25 PM, sunny agrawal <sunny816.i...@gmail.com>wrote: > no we can divide also with in the same loop > > On Tue, Jun 21, 2011 at 3:20 PM, PRAMENDRA RATHi rathi < > prathi...@gmail.com> wrote: > >> @sunny if we calculate (n-r+1)*(n-r+2).....*n first and then divide this >> value by r!.. >> then this method will fail with little large value of n..because first >> value will increase vry fast and will go out of limit.. >> >> >> >> >> >> >> >> >> ----------------------------------------- >> PRAMENDRA RATHI >> NIT ALLAHABAD >> >> >> >> >> >> On Tue, Jun 21, 2011 at 2:52 PM, sunny agrawal >> <sunny816.i...@gmail.com>wrote: >> >>> DP is good when we need to use intermediate values too.. >>> here we only need to compute nCr as a final result >>> so we cannot use DP here >>> >>> the Logic Vandana used will be helpful here. >>> >>> as nCr = n! / r! * n-r! >>> without loss of generality we can assume that r < n-r else we can just >>> replace r = n-r >>> >>> then we need to compute is >>> (n-r+1)*(n-r+2)*.........*(n) / 1.2.3.....r >>> that can be computed in O(r) >>> >>> >>> >>> On Tue, Jun 21, 2011 at 2:04 PM, kartik sachan >>> <kartik.sac...@gmail.com>wrote: >>> >>>> but for big numbers this method is very expensive................and >>>> hope give TLE in 1 sec question where n=1000 >>>> >>>> -- >>>> 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. >>> >> >> -- >> 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. > -- 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.
