Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:65: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] std::ifstream u("flori4.in");std::ofstream t("flori4.out");main(){int i=3,a=2,b=4,e,n;u>>n;for(;i<n;i++)e=b,b=(a+1+b)%9001,a=e;t<<b;} ^