Compilare: main.cpp: In function 'std::vector<Point> convex_hull(std::vector<Point>)': main.cpp:40:48: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i = 0, t = 1; i >= 0; i += (t = (i == P.size() - 1 ? -t : t))) { | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int get_max_x(std::vector<Point>&, int, double)': main.cpp:54:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(int i = 0; i < C.size() - 1; i++) { | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int get_min_x(std::vector<Point>&, int, double)': main.cpp:80:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | for(int i = 0; i < C.size() - 1; i++) { | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int get_min_y(std::vector<Point>&, int, double)': main.cpp:106:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for(int i = 0; i < C.size() - 1; i++) { | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:154:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 154 | for(int i = 0; i < C.size() - 1; i++) { | ~~^~~~~~~~~~~~~~