public long GetOreRequirementFor(ReactionItem ri)
{
var pool = ReactionPool.InitWith(ri);
var reactionItem = ReduceToOre(pool);
return(reactionItem.Quantity);
}
public static ReactionPool InitWith(ReactionItem ri)
{
var pool = new ReactionPool();
pool[ri.Chemical] = ri;
return(pool);
}
static List <ReactionItem> ParseInput(ReadOnlySpan <char> str)
{
var result = new List <ReactionItem>();
while (true)
{
var idx = str.IndexOf(',');
if (idx == -1)
{
result.Add(ReactionItem.Parse(str));
return(result);
}
else
{
result.Add(ReactionItem.Parse(str.Slice(0, idx)));
str = str.Slice(idx + 2); // +1 for space after ','
}
}
}
static ReactionItem ParseOutput(ReadOnlySpan <char> str)
{
return(ReactionItem.Parse(str));
}
public Reaction(ReactionItem output, IEnumerable <ReactionItem> input)
{
Output = output;
Input = input;
}