Compilare: main.cpp: In function 'int main()': main.cpp:48:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(i=2; i<v.size(); i++) | ~^~~~~~~~~ main.cpp:64:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(i=0; i<v2.size(); i++) | ~^~~~~~~~~~