Eroare de compilare: user.cpp:16:13: error: variable ‘std::ifstream cin’ has initializer but incomplete type ifstream cin("granita.in"); ^ user.cpp:17:14: error: variable ‘std::ofstream cout’ has initializer but incomplete type ofstream cout("granita.out"); ^ user.cpp: In function ‘int main()’: user.cpp:21:5: error: reference to ‘cin’ is ambiguous cin>>n; ^ user.cpp:16:10: note: candidates are: <typeprefixerror>cin ifstream cin("granita.in"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:24:9: error: reference to ‘cin’ is ambiguous cin>>c[i].a>>c[i].b; ^ user.cpp:16:10: note: candidates are: <typeprefixerror>cin ifstream cin("granita.in"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:42:5: error: reference to ‘cout’ is ambiguous cout<<k; ^ user.cpp:17:10: note: candidates are: <typeprefixerror>cout ofstream cout("granita.out"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^ user.cpp:20:11: warning: unused variable ‘a’ [-Wunused-variable] int n,a,b,i,k=0,l=0; ^ user.cpp:20:13: warning: unused variable ‘b’ [-Wunused-variable] int n,a,b,i,k=0,l=0; ^