@vishwanathan i think this is same as external sort.. this is the same i was thinking.. external sort in *"mark allen wiese"*
On Fri, Sep 4, 2009 at 8:59 PM, viswanath ramakrishnan < srviswanat...@gmail.com> wrote: > > > Q.3: Given a set of 1 Trillion integers on hard disk, find the > smallest 1 > million of them. You can fit at most 1 million integers in memory at a > time. > State the fastest solution you can think of. > > take the first 1 million out of 1 trillion and sort the 1 million > integersand store it back in the hard disk. > In this way carry on the sorting for every group of 1 million integers > and store it in the hard drive . Now groups of 1 million integers are > sorted upto 1 trillion. > now compare the first element of all the sorted groups the minimum of > them is the minimum of the 1 trillion. store it as the first element > in the memory. > next take the second element from the group from which the smallest > elemnt came and then check it with all other groups first element. > In this way repeat the procedureuntil the first 1 million is sorted > and stored in the memory. > > correct me if i am wrong..... > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
