Compilare: user.cpp: In function ‘bool Search(double, double)’: user.cpp:32:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<H[S].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:42:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:45:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%lf%lf",&v[i].x,&v[i].y); ^