Compilare: user.cpp: In function ‘std::istream& operator>>(std::istream&, Point&)’: user.cpp:30:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void customMerge(int, int, int, int, long long int)’: user.cpp:86:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = st, j = 0; j < aux.size(); ++i, ++j) { ^ user.cpp: In function ‘long long int closestPoints(int, int, int)’: user.cpp:123:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < middlePoints.size(); ++i) { ^ user.cpp:124:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < middlePoints.size(); ++j) { ^