Eroare de compilare: main.cpp:2:51: error: variable 'std::ifstream cin' has initializer but incomplete type using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^ main.cpp:2:76: error: variable 'std::ofstream cout' has initializer but incomplete type using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^ main.cpp: In function 'int dfs(int)': main.cpp:2:106: warning: no return statement in function returning non-void [-Wreturn-type] using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^ main.cpp: In function 'int main()': main.cpp:2:118: error: reference to 'cin' is ambiguous using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^~~ main.cpp:2:48: note: candidates are: <typeprefixerror>cin using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^~~ 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:2:123: error: 'n' was not declared in this scope using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^ main.cpp:2:182: error: reference to 'cin' is ambiguous using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^~~ main.cpp:2:48: note: candidates are: <typeprefixerror>cin using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^~~ 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:16:5: error: reference to 'cout' is ambiguous cout<<"nu stiu dfs"; ^~~~ main.cpp:2:72: note: candidates are: <typeprefixerror>cout using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^~~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^~~~ main.cpp:17:5: error: reference to 'cout' is ambiguous cout<<"dar dfs e solutia si tii un contor pentru cel mai scurt drum"; ^~~~ main.cpp:2:72: note: candidates are: <typeprefixerror>cout using namespace std;int m[2005][2005];ifstream cin("alee.in");ofstream cout("alee.out");int dfs(int nod){}int main(){cin>>n;for(int i = 1; i <= n ; ++i){for(int j = 1; j <= n; ++j){cin>>m[i][j];}} ^~~~ Non zero exit status: 1