Eroare de compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:17: error: 'it' was not declared in this scope dfs(it); ^~ main.cpp: In function 'int main()': main.cpp:32:5: error: reference to 'cin' is ambiguous cin >> n >> m >> k >> p; ^~~ main.cpp:7:10: note: candidates are: std::ifstream cin ifstream cin("marvel.in"); ^~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^~~ main.cpp:35:9: error: reference to 'cin' is ambiguous cin>>val[i]; ^~~ main.cpp:7:10: note: candidates are: std::ifstream cin ifstream cin("marvel.in"); ^~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^~~ main.cpp:38:9: error: reference to 'cin' is ambiguous cin>>nr[i]; ^~~ main.cpp:7:10: note: candidates are: std::ifstream cin ifstream cin("marvel.in"); ^~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^~~ main.cpp:42:9: error: reference to 'cin' is ambiguous cin >> x >> y; ^~~ main.cpp:7:10: note: candidates are: std::ifstream cin ifstream cin("marvel.in"); ^~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^~~ main.cpp:70:5: error: reference to 'cout' is ambiguous cout<<ans.size()<<"\n"; ^~~~ main.cpp:8:10: note: candidates are: std::ofstream cout ofstream cout("marvel.out"); Non zero exit status: 1