Compilare: user.cpp: In function ‘void blf(int)’: user.cpp:78:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<neighbors[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:27:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&V,&E); ^ user.cpp:31:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&src,&dst,&cst); ^