Compilare: user.cpp: In member function ‘long long int ClosestPoints::divide(int, int)’: user.cpp:55:81: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=m+1; points[i].first - points[m].first <= result && i<points.size(); ++i) Y.push_back(points[i]); ^ user.cpp:59:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<Y.size(); ++i) { ^ user.cpp:60:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=i+1; j-i <= 7 && j<Y.size(); ++j) { ^