Compilare: user.cpp: In function ‘double brute_force(std::vector<Point>)’: user.cpp:41:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i+1; j <= v.size(); j++){ ^ user.cpp:42:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i != j){ ^ user.cpp: In function ‘double split_plane(std::vector<Point>)’: user.cpp:73:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = lm; i < v.size() && abs(xm - v[i].x) < dmin; i++) ^ user.cpp:65:10: warning: unused variable ‘dmin2’ [-Wunused-variable] double dmin2 = split_plane(v2); ^