Compilare: user.cpp: In function ‘int BF(int)’: user.cpp:21:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<G[nod].size();j++) ^ user.cpp: In function ‘int Flow(int)’: user.cpp:37:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[D].size();i++) ^ user.cpp:58:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^