Compilare: main.cpp: In function 'int main()': main.cpp:101:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for (int i = 0; i < hull.size(); ++i) { | ~~^~~~~~~~~~~~~ main.cpp:112:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 112 | for (int i = 1; i < hull.size(); ++i) { | ~~^~~~~~~~~~~~~ main.cpp:94:7: warning: variable 'ba' set but not used [-Wunused-but-set-variable] 94 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~ main.cpp:94:15: warning: variable 'ta' set but not used [-Wunused-but-set-variable] 94 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~ main.cpp:94:23: warning: variable 'la' set but not used [-Wunused-but-set-variable] 94 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~ main.cpp:94:31: warning: variable 'ra' set but not used [-Wunused-but-set-variable] 94 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~