Compilare: main.cpp: In function 'int main()': main.cpp:36:28: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 36 | while(stiva.size() >= k + 1 && directie(stiva[stiva.size() - 2].first, stiva[stiva.size() - 2].second, stiva[stiva.size() - 1].first, stiva[stiva.size() - 1].second, puncte[i].first, puncte[i].second) <= 1e-12){ | ~~~~~~~~~~~~~^~~~~~~~ main.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for(i = 0; i < stiva.size() - 1; i++){ | ~~^~~~~~~~~~~~~~~~~~