Compilare: user.cpp: In function ‘void bellman()’: user.cpp:29:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i < E.size(); ++i) // OINC! ^ user.cpp:31:14: warning: unused variable ‘pupa1’ [-Wunused-variable] int pupa1 = E[i].x , pupa2 = E[i].y; ^ user.cpp:31:31: warning: unused variable ‘pupa2’ [-Wunused-variable] int pupa1 = E[i].x , pupa2 = E[i].y; ^ user.cpp:18:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0; ^