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 f("modulo.in");std::ofstream g("modulo.out");main(){unsigned long long n,s=1,p,c;f>>n>>p>>c;while(p){if(p&1)s=(s*n)%c;n=(n*n)%c;p>>=1;}g<<s;} ^