Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 1 | #import<fstream> | ^~~~~~ main.cpp:2:88: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 2 | int64_t d(int x){int64_t rez=0;for(int i=1;i*i<=x;i++){rez+=1+2LL*(x/i-i);}return rez;}main(){int a,b;(std::ifstream("ndiv.in"))>>a>>b;(std::ofstream("ndiv.out"))<<d(b)-d(a-1);} | ^~~~