Given two sorted positive integer arrays A(n) and B(n), we define a
set S = {(a,b) | a \in A and b
\in B}. Obviously there are n2 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.

How to do this in O(nlogn) time.

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