Compilare: user.cpp: In function ‘int DFS_First()’: user.cpp:22:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[x].size();i++) ^ user.cpp: In function ‘int DFS_Second(int)’: user.cpp:50:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[x].size();i++) ^ user.cpp: In function ‘void Diametru()’: user.cpp:32:22: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] int mx=-LONG_MAX,poz; ^