Compilare: user.cpp: In function ‘void BFS()’: user.cpp:28:32: 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:48:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[t].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:82:13: warning: unused variable ‘num’ [-Wunused-variable] { int i,x,y,num; ^