Compilare: user.cpp: In function ‘int bfs()’: user.cpp:27:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:66:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[sf].size();i++) ^ user.cpp:100:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();i++) ^