Compilare: user.cpp: In function ‘void addPoint(Point)’: user.cpp:44:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < P.size(); i++) { ^ user.cpp:45:26: warning: narrowing conversion of ‘P.std::vector<_Tp, _Alloc>::size<Point, std::allocator<Point> >()’ from ‘std::vector<Point>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] S.insert({P.size(), i, distance(A, P[i])}); ^ user.cpp: In function ‘int main()’: user.cpp:103:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:105:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &x, &y); ^