private static Variant CreateNewVariant(Variant variant, Pile selectedPile, Potter aBook)
{
var newPile = new Pile(selectedPile.Books);
newPile.Add(aBook);
var newVariant = new Variant(variant.Piles.Where(p => p != selectedPile));
newVariant.Add(newPile);
return newVariant;
}
public Variant SortBooks(Dictionary<Potter, int> notYetSorted, Variant sortedPerDiscount)
{
var newPile = new Pile(notYetSorted.Select(b => b.Key));
var remain = notYetSorted.Where(b => b.Value > 1).ToDictionary(b => b.Key, b => b.Value - 1);
sortedPerDiscount.Add(newPile);
return remain.Count > 0
? SortBooks(remain, sortedPerDiscount)
: sortedPerDiscount;
}
public void Add(Pile newPile)
{
_piles.Add(newPile);
UpdateHashes();
}
