Compilare: main.cpp: In function 'std::vector<point> convexhull(std::vector<point>)': main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:33:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for (int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:41:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:48:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:71:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for (int i=0;i<v.size();i++) | ~^~~~~~~~~