void moveTopTo(Tower& t){
int top = disks.top();
disks.pop();
t.add(top);
cout<<"Move disk "<<top<<" from "<<Index()<<" to "<<t.Index()<<endl;
}
int MoveTopTo(Tower t)
{
int disk = stack.pop();
t.add(disk);
}
void moveTopTo(Tower t) {
int top = disks.pop();
t.add(top);
}