Compilare: user.cpp: In function ‘bool BFS()’: user.cpp:53:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < vecini[nod].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:72:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < vecini[n].size();++i) ^