Eroare de compilare: main.cpp: In function 'int main()': main.cpp:12:5: error: 'ifstream' was not declared in this scope ifstream f("pesti.in"); ^~~~~~~~ main.cpp:12:5: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/iosfwd:162:34: note: 'std::ifstream' typedef basic_ifstream<char> ifstream; ^~~~~~~~ main.cpp:13:5: error: 'ofstream' was not declared in this scope ofstream g("pesti.out"); ^~~~~~~~ main.cpp:13:5: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/iosfwd:165:34: note: 'std::ofstream' typedef basic_ofstream<char> ofstream; ^~~~~~~~ main.cpp:14:5: error: 'f' was not declared in this scope f>>n>>x; ^ main.cpp:44:5: error: 'g' was not declared in this scope g<<z<<' '<<x<<' '<<zi<<'\n'; ^ Non zero exit status: 1