Recently I have encountered many questions which require performing some operations like XOR, or some f(x) pairwise on a Set…

by pairwise I mean, if set is {2, 4, 6}

then required O/P is 2^4 + 4^6 + 6^2 or f(2,4) + f(4,6) + f(6,2)

How to handle such questions, someone help…

Also can such questions be solved using DP?