Hi Divya,
A[n] and B[n] are two array loop=n, i=n-1, j=n-1; while(loop>0) // for n largest pairs { print A[i]+B[j]; // sum of last index from both array will be max foo = MAX ( A[i-1]+B[j], A[i-1]+B[j-1], A[i]+B[j-1] ) // using DP moving backward if foo=A[i-1]+B[j]; i-- // only reduce A if foo=A[i-1]+B[j-1]; i--; j-- // reduce both A and B if foo=A[i]+B[j-1]; j-- // reduce only B } Time: O(n) Mohit Ranjan On Fri, Apr 30, 2010 at 5:35 PM, divya <sweetdivya....@gmail.com> wrote: > Given two sorted postive integer arrays A(n) and B(n) (W.L.O.G, let's > say they are decreasingly sorted), we define a set S = {(a,b) | a \in > A > and b \in B}. Obviously there are n^2 elements in S. The value of such > a pair is defined as Val(a,b) = a + b. Now we want to get the n pairs > from S with largest values. The tricky part is that we need an O(n) > algorithm. > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algoge...@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@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 algoge...@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.