Compilare: user.cpp: In function ‘int main()’: user.cpp:20:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h=a; h<=b; h++) ^ user.cpp:23:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(maxd<aux2) ^ user.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(maxd==aux2) ^ user.cpp: In function ‘long long unsigned int nrdiv(long long unsigned int)’: user.cpp:66:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=3; i<=x2; i+=2) ^