Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 1 | #import<fstream> | ^~~~~~ main.cpp:2:19: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 2 | int64_t r,a,b,i=1;main(){std::ifstream("ndiv.in")>>a>>b;for(;i*i<=b;i++)r+=1+2*(b/i-i);for(i=1;i*i<a;i++)r-=1+2*((a-1)/i-i);std::ofstream("ndiv.out")<<r;} | ^~~~