Eroare de compilare: user.cpp:6:14: error: variable ‘std::ifstream cin’ has initializer but incomplete type ifstream cin ("cmlsc.in" ); ^ user.cpp:7:14: error: variable ‘std::ofstream cout’ has initializer but incomplete type ofstream cout("cmlsc.out"); ^ user.cpp: In function ‘void read()’: user.cpp:14:5: error: reference to ‘cin’ is ambiguous cin >> n >> m; ^ user.cpp:6:10: note: candidates are: <typeprefixerror>cin ifstream cin ("cmlsc.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:18:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < a.size(); cin >> a[i++]); ^ user.cpp:18:35: error: reference to ‘cin’ is ambiguous for (int i = 1; i < a.size(); cin >> a[i++]); ^ user.cpp:6:10: note: candidates are: <typeprefixerror>cin ifstream cin ("cmlsc.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:19:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < b.size(); cin >> b[i++]); ^ user.cpp:19:35: error: reference to ‘cin’ is ambiguous for (int i = 1; i < b.size(); cin >> b[i++]); ^ user.cpp:6:10: note: candidates are: <typeprefixerror>cin ifstream cin ("cmlsc.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: In function ‘void solve()’: user.cpp:25:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < x.size(); x[i++].resize(b.size() )); ^ user.cpp:27:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < x.size(); i++) ^