@malay --- we can do it by precomputing the prime arrays ....................
On Sun, May 20, 2012 at 1:10 AM, malay chakrabarti <m1234...@gmail.com>wrote: > method is ryt but to find ith prime u cannot to it in constant time. > On May 19, 2012 7:30 PM, "HARSHIT PAHUJA" <hpahuja.mn...@gmail.com> > wrote: > >> given 2 unsorted integer arrays a and b of equal size. Determine if b is >> a permutation of a. Can this be done in O(n) time and O(1) space ? >> >> >> >> >> please help me with my solution >> >> >> suppose a -- 3 5 4 >> b -- 4 3 5 >> >> now we replace a[i] with a[i]..th prime number and b with b[i] .. th >> prime number >> >> now array a becomes 5 11 7 >> array b becomes 7 5 11 >> >> now we take product of elements of array a and do the same with array b >> elements >> if product is equal then b is a permutation of a >> >> -- >> 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. > -- HARSHIT PAHUJA M.N.N.I.T. ALLAHABAD -- 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.
