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Algorithm C++ Transform_Reduce . It also results in cleaner code by separating the reduction operation, in this case std:: Std::transform_reduce is also a recent addition to the stl, we can use it starting from c++17. C++ algorithm transform() function javatpoint from www.javatpoint.com A much cleaner solution would be to also have a std::stable_reduce with theoretically a bit less performance but not requiring commutativity. 2,4,6) same as (1,3,5), but executed according to policy. Std::transform applies the given function to a range and stores the result in another range, beginning at d_first.