Compilare: user.cpp: In function ‘void BFS()’: user.cpp:35:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘void Flux()’: user.cpp:48:8: warning: unused variable ‘i’ [-Wunused-variable] { int i,res,x,n1,n2; ^ user.cpp: In function ‘int main()’: user.cpp:78:13: warning: unused variable ‘num’ [-Wunused-variable] { int i,x,y,num; ^