Compilare: user.cpp: In function ‘int BellmanFord()’: user.cpp:44:32: 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:77:27: warning: unused variable ‘res’ [-Wunused-variable] { int i,x,y,cap,cst,sol=0,res=0,xm; ^ user.cpp:77:33: warning: unused variable ‘xm’ [-Wunused-variable] { int i,x,y,cap,cst,sol=0,res=0,xm; ^