Eroare de compilare: user.cpp: In function 'int main()': user.cpp:34: error: no matching function for call to 'std::vector<std::pair<long long int, int>, std::allocator<std::pair<long long int, int> > >::push_back(int, int)' /usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/stl_vector.h:602: note: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = std::pair<long long int, int>, _Alloc = std::allocator<std::pair<long long int, int> >]