Compilare: user.cpp: In function ‘bool inuti(PTX, std::vector<PTX>)’: user.cpp:40:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<hull.size(); ++i) { ^ user.cpp: In function ‘std::vector<PTX> make_hull(int, int)’: user.cpp:57:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<tmp.size(); ++i) { ^ user.cpp:63:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<tmp.size(); ++i) { ^ user.cpp:69:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ue.size(); ++i) ^ user.cpp: In function ‘bool disjoint(const std::vector<PTX>&, const std::vector<PTX>&)’: user.cpp:78:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<a.size(); ++i) ^ user.cpp:81:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<b.size(); ++i) ^ user.cpp: In function ‘int bfs(int)’: user.cpp:136:1: warning: control reaches end of non-void function [-Wreturn-type] } ^