namespace boost {
  template<typename ForwardIter> 
    std::pair< ForwardIter, ForwardIter > 
    minmax_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    std::pair< ForwardIter, ForwardIter > 
    minmax_element(ForwardIter first, ForwardIter last, BinaryPredicate comp);
  template<typename ForwardIter> 
    ForwardIter first_min_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    ForwardIter first_min_element(ForwardIter first, ForwardIter last, 
                                  BinaryPredicate comp);
  template<typename ForwardIter> 
    ForwardIter last_min_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    ForwardIter last_min_element(ForwardIter first, ForwardIter last, 
                                 BinaryPredicate comp);
  template<typename ForwardIter> 
    ForwardIter first_max_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    ForwardIter first_max_element(ForwardIter first, ForwardIter last, 
                                  BinaryPredicate comp);
  template<typename ForwardIter> 
    ForwardIter last_max_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    ForwardIter last_max_element(ForwardIter first, ForwardIter last, 
                                 BinaryPredicate comp);
  template<typename ForwardIter> 
    std::pair< ForwardIter, ForwardIter > 
    first_min_first_max_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    std::pair< ForwardIter, ForwardIter > 
    first_min_first_max_element(ForwardIter first, ForwardIter last, 
                                BinaryPredicate comp);
  template<typename ForwardIter> 
    std::pair< ForwardIter, ForwardIter > 
    first_min_last_max_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    std::pair< ForwardIter, ForwardIter > 
    first_min_last_max_element(ForwardIter first, ForwardIter last, 
                               BinaryPredicate comp);
  template<typename ForwardIter> 
    std::pair< ForwardIter, ForwardIter > 
    last_min_first_max_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    std::pair< ForwardIter, ForwardIter > 
    last_min_first_max_element(ForwardIter first, ForwardIter last, 
                               BinaryPredicate comp);
  template<typename ForwardIter> 
    std::pair< ForwardIter, ForwardIter > 
    last_min_last_max_element(ForwardIter first, ForwardIter last);
  template<typename ForwardIter, typename BinaryPredicate> 
    std::pair< ForwardIter, ForwardIter > 
    last_min_last_max_element(ForwardIter first, ForwardIter last, 
                              BinaryPredicate comp);
}