Compilare: user.cpp: In function ‘int main()’: user.cpp:69:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ^ user.cpp:35:58: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d%d%d\n",&n,&m,&is,&js,&ifn,&jfn); ^ user.cpp:37:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets (sc,5000,fin); ^