Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:61: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] std::ifstream f("suma.in");std::ofstream g("suma.out");main(){size_t N,P;f>>N>>P;N%=P;g<<(N*N*N-N)/3%P;} ^