Compilare: user.cpp: In function ‘void bfs()’: user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp:32:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nodatac].size();i++) ^ user.cpp: In function ‘bool bf()’: user.cpp:52:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vec[start].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:90:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nodatac].size();i++) ^