Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:37:18: error: request for member ‘push_back’ in ‘graph.std::vector<_Tp, _Alloc>::operator[]<int, std::allocator<int> >(((std::vector<int>::size_type)x))’, which is of non-class type ‘__gnu_cxx::__alloc_traits<std::allocator<int> >::value_type {aka int}’ graph[x].push_back(y); ^ user.cpp: In function ‘void bfs()’: user.cpp:56:54: error: request for member ‘begin’ in ‘graph.std::vector<_Tp, _Alloc>::operator[]<int, std::allocator<int> >(((std::vector<int>::size_type)act))’, which is of non-class type ‘__gnu_cxx::__alloc_traits<std::allocator<int> >::value_type {aka int}’ for ( vector<int> :: iterator i = graph[act].begin(); i < graph[act].end(); ++i ) ^ user.cpp:56:78: error: request for member ‘end’ in ‘graph.std::vector<_Tp, _Alloc>::operator[]<int, std::allocator<int> >(((std::vector<int>::size_type)act))’, which is of non-class type ‘__gnu_cxx::__alloc_traits<std::allocator<int> >::value_type {aka int}’ for ( vector<int> :: iterator i = graph[act].begin(); i < graph[act].end(); ++i ) ^