Compilare: main.cpp: In function 'void dfs(int)': main.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp:36:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp:39:25: warning: 'z' may be used uninitialized in this function [-Wmaybe-uninitialized] if(urm!=ant[nod]&&urm!=z) ant2[fz[urm]]=nod; ~~~~~~~~~~~~~^~~~~~~~