Eroare de compilare: user.cpp: In function 'void sterge_muchii(int, int)': user.cpp:17: error: no match for 'operator[]' in 'a[nod][i]' /usr/include/c++/4.2/bits/stl_vector.h:474: note: candidates are: typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::reference std::vector<_Tp, _Alloc>::operator[](size_t) [with _Tp = int, _Alloc = std::allocator<int>] /usr/include/c++/4.2/bits/stl_vector.h:489: note: typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::const_reference std::vector<_Tp, _Alloc>::operator[](size_t) const [with _Tp = int, _Alloc = std::allocator<int>]