Compilare: user.cpp: In function ‘void bellman()’: user.cpp:37:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i < E.size(); ++i) // OINC! ^ user.cpp:39:14: warning: unused variable ‘pupa1’ [-Wunused-variable] int pupa1 = E[i].x , pupa2 = E[i].y; ^ user.cpp:39:31: warning: unused variable ‘pupa2’ [-Wunused-variable] int pupa1 = E[i].x , pupa2 = E[i].y; ^ user.cpp:53:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<dd.size();i++) ^