Eroare de compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:21:17: error: no match for ‘operator[]’ (operand types are ‘bool [100005]’ and ‘std::vector<int>::iterator {aka __gnu_cxx::__normal_iterator<int*, std::vector<int> >}’) if (!vis[it]) ^ user.cpp:22:19: error: cannot convert ‘std::vector<int>::iterator {aka __gnu_cxx::__normal_iterator<int*, std::vector<int> >}’ to ‘int’ for argument ‘1’ to ‘void dfs(int)’ dfs(it); ^