Compilare: main.cpp: In function 'int main()': main.cpp:60:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int i=0;i<rez.size();i++)swap(rez[i].first,rez[i].second),cout<<fixed<<setprecision(6)<<rez[i]<<'\n'; | ~^~~~~~~~~~~