Compilare: user.cpp: In function ‘int main()’: user.cpp:31:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[T].size();j++) ^ user.cpp:35:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ind=0;ind<v[nod].size();ind++) ^ user.cpp:38:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[T].size();j++) ^ user.cpp:47:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(idx=0;idx<v[start].size();idx++) ^