Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:32: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] int64_t a,b,x,y,z=1,r,c,d;main(){std::ifstream{"inversmodular.in"}>>a>>b;d=b;while(a)r=b%a,c=b/a,b=a,a=r,x=y-c*z,y=z,z=x;while(y<0)y+=d;std::ofstream{"inversmodular.out"}<<y;} ^