Eroare de compilare in evaluator: user.cpp:33:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:20: error: no matching function for call to 'std::vector<std::pair<int, int>, std::allocator<std::pair<int, int> > >::push_back(int&, int&)' /usr/include/c++/4.2/bits/stl_vector.h:597: note: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = std::pair<int, int>, _Alloc = std::allocator<std::pair<int, int> >]