Compilare: user.cpp: In function ‘int main()’: user.cpp:48:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size()-1;i++) ^ user.cpp:25:29: 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:29:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&src,&dst); ^