Compilare: user.cpp: In function ‘int main()’: user.cpp:13:29: 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:19:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&p1,&p2,&c); ^ user.cpp:42:32: warning: ‘mpos2’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(it=adj[mpos].begin(),co=cos[mpos].begin();it!=adj[mpos].end();++it,++co) ^