Compilare: user.cpp: In member function ‘void Euler::WriteCycle()’: user.cpp:72:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<answer.size()-1;++i)fprintf(fout,"%d ",answer[i]); ^ user.cpp: In member function ‘void Euler::ReadData()’: user.cpp:77:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&N,&M); ^ user.cpp:80:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&x,&y); ^