int Iterate(string input, int iterations)
{
var mtx = Mtx.FromString(".#./..#/###");
var ruleset = new RuleSet(input);
for (var i = 0; i < iterations; i++)
{
mtx = ruleset.Apply(mtx);
}
return(mtx.Count());
}
public RuleSet(string input)
{
rules2 = new Dictionary <int, Mtx>();
rules3 = new Dictionary <int, Mtx>();
foreach (var line in input.Split('\n'))
{
var parts = Regex.Split(line, " => ");
var left = parts[0];
var right = parts[1];
var rules =
left.Length == 5 ? rules2 :
left.Length == 11 ? rules3 :
throw new Exception();
foreach (var mtx in Variations(Mtx.FromString(left)))
{
rules[mtx.CodeNumber] = Mtx.FromString(right);
}
}
}