template<forward_­iterator I, sentinel_­for<I> S, class Proj = identity,
         indirect_­strict_­weak_­order<projected<I, Proj>> Comp = ranges::less>
  constexpr ranges::minmax_element_result<I>
    ranges::minmax_element(I first, S last, Comp comp = {}, Proj proj = {});
template<forward_­range R, class Proj = identity,
         indirect_­strict_­weak_­order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
  constexpr ranges::minmax_element_result<borrowed_iterator_t<R>>
    ranges::minmax_element(R&& r, Comp comp = {}, Proj proj = {});