Compilare: user.cpp: In function ‘std::pair<double, double> apm(double)’: user.cpp:106:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:128:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) ^ user.cpp:129:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1;j<v.size();j++){ ^ user.cpp:142:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<inter.size();i++) ^