Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:25:5: error: ‘ifstream’ was not declared in this scope ifstream f("z.in"); ^ user.cpp:25:14: error: expected ‘;’ before ‘f’ ifstream f("z.in"); ^ user.cpp:26:5: error: ‘ofstream’ was not declared in this scope ofstream g("z.out"); ^ user.cpp:26:14: error: expected ‘;’ before ‘g’ ofstream g("z.out"); ^ user.cpp:27:5: error: ‘f’ was not declared in this scope f>>n>>k; ^ user.cpp:30:9: error: ‘g’ was not declared in this scope g<<solve(N)<<'\n'; ^