src.hpp

#include <memory>

using namespace std;

template <typename T, typename U>
ostream& operator<<(ostream& os, const pair<T, U> p) {
  os << '(' << p.first << ',' << p.second << ')';
  return os;
}

template <typename T,
          template <typename _1, typename _2=allocator<_1> > class Container>
ostream& operator<<(ostream& os, const Container<T>& p) {

  typename Container<T>::const_iterator e = p.end();
  for (typename Container<T>::const_iterator it = p.begin(); it != e; ++it)
    os << *it << '\n';
  return os;
}

template <typename T,
          template <typename _1, typename _2, typename _3=allocator<_1> > class Container,
          template <typename> class Compare>
ostream& operator<<(ostream& os, const Container<T, Compare<T> >& p) {

  typename Container<T, Compare<T> >::const_iterator e = p.end();
  for (typename Container<T, Compare<T> >::const_iterator it = p.begin(); it != e; ++it)
    os << *it << '\n';
  return os;
}

template <typename T, typename U,
          template <typename _1, typename _2, typename _3, typename _4=allocator<pair<const _1, _2> > > class Container,
          template <typename> class Compare>
ostream& operator<<(ostream& os, const Container<T, U, Compare<T> >& p) {

  typename Container<T, U, Compare<T> >::const_iterator e = p.end();
  for (typename Container<T, U, Compare<T> >::const_iterator it = p.begin(); it != e; ++it)
    os << *it << '\n';
  return os;
}