public static IEnumerable <int> TotalCoinsForEachCombination(RuntimeCoin c)
{
if (!c.Next.Any())
{
return new[] { c.NumCoins }
}
;
return(c.Next.SelectMany(TotalCoinsForEachCombination).Select(x => x + c.NumCoins));
}
public static int NumCoinsForLeafNode(RuntimeCoin c)
{
return(c.NumCoins);
}