Compilare: user.cpp: In function ‘int main()’: user.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[nod].size();j++){ ~^~~~~~~~~~~~~~ user.cpp:29:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:37:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&x,&y,&c); ^