Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:24:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp:15:10: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,nod,nod2; ^ user.cpp: In function ‘int main()’: user.cpp:49:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[n].size();i++) ^