Compilare: user.cpp: In function ‘bool BellmanFord(int, int, double)’: user.cpp:41:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:86:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&n); ^ user.cpp:88:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lf %lf " ,&A[i].x,&A[i].y); ^ user.cpp:90:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lf %lf " ,&B[i].x,&B[i].y); ^