Compilare: user.cpp: In function ‘double DivImp(std::vector<std::pair<int, int> >, std::vector<std::pair<int, int> >, int, int)’: user.cpp:69:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<LY.size()-1; i++){ ^ user.cpp: In function ‘int main()’: user.cpp:105:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<X.size(); i++){ ^