internal (Tower, int) getWrongTower()
{
var groups = SubTowers.GroupBy(c => c.getWeight());
int correctWeight = groups.First(c => c.Count() > 1).Key;
var wrongTower = groups.First(c => c.Count() == 1).First();
return(wrongTower, correctWeight);
}
internal bool isBalanced()
{
return(SubTowers.GroupBy(c => c.getWeight()).Count() == 1);
}