Compilare: user.cpp: In function ‘double threePoints(std::vector<Point>)’: user.cpp:31:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size() - 1; i++) ^ user.cpp:32:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < v.size(); j++) ^ user.cpp:34:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘double findMinDistance(std::vector<Point>)’: user.cpp:67:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < midRegion.size(); i++) ^ user.cpp:69:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i + j < midRegion.size()) ^