Eroare de compilare: user.cpp: In function ‘void f(int)’: user.cpp:13:13: error: ‘void f(int)’ redeclared as different kind of symbol void f(int x) ^ user.cpp:9:10: error: previous declaration of ‘std::ifstream f’ ifstream f("perechi.in"); ^ user.cpp: In function ‘int main()’: user.cpp:40:12: error: no match for call to ‘(std::ifstream {aka std::basic_ifstream<char>}) (long long int&)’ f(n); ^