Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:57:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[act].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:25:30: 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:28:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&x,&y); ^