Compilare: user.cpp: In function ‘void find_cut_vertex(int, int)’: user.cpp:28:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[node].size();i++){ ~^~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:55:29: 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:57:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&i,&j); ^