template <class T>
inline void INSERT_ELEMENTS (T& coll, int first, int last)
{
    for (int i=first; i&lt;=last; ++i) {
        coll.insert(coll.end(),i);
    }
}
using namespace std;

void printCollection (const list<int>& l)
{
    PRINT_ELEMENTS(l);
}

bool lessForCollection (const list& l1, const list& l2);