Compilare: main.cpp: In function 'void convex_hull(std::vector<pt>&, bool)': main.cpp:56:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<pt>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | if (i == a.size() - 1 || cw(p1, a[i], p2, include_collinear)) { | ~~^~~~~~~~~~~~~~~ main.cpp:61:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<pt>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | if (i == a.size() - 1 || ccw(p1, a[i], p2, include_collinear)) { | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:124:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<pt>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 124 | for(int i=0; i<vec.size(); i++){ | ~^~~~~~~~~~~ main.cpp:129:20: warning: unused variable 'span' [-Wunused-variable] 129 | double span = dist(projection(a, b, vec[i1]), projection(a, b, vec[i2])); | ^~~~ main.cpp:156:20: warning: unused variable 'span' [-Wunused-variable] 156 | double span = dist(projection_vert(b, vec[i1]), projection_vert(b, vec[i2])); | ^~~~