private int Run(RulesInput input, bool isPart2)
{
var rules = input.Rules.ToList();
if (isPart2)
{
rules.Add(new Rule
{
Id = 8,
SubRules = new List <int>
{
42, 8
}
});
rules.Add(new Rule
{
Id = 11,
SubRules = new List <int> {
42, 11, 31
}
});
}
var matcher = new RuleMatcher(rules);
int count = 0;
foreach (var msg in input.Messages)
{
if (matcher.IsMatch(msg))
{
count++;
}
}
return(count);
}
private RulesInput ParseInput(string input)
{
var result = new RulesInput();
var lines = input.Trim().SplitByLine();
foreach (var line in lines)
{
if (_regex.IsMatch(line))
{
var match = _regex.Match(line);
if (match.Groups[2].Success)
{
result.Rules.Add(new Rule
{
Id = int.Parse(match.Groups[1].Value),
LiteralValue = match.Groups[2].Value
});
}
else
{
var sequence = new List <int>();
var alternateSequence = new List <List <int> > {
sequence
};
for (var i = 0; i < match.Groups[4].Captures.Count; i++)
{
if (match.Groups[3].Captures[i].Length != 0)
{
alternateSequence.Add(sequence = new List <int>());
}
sequence.Add(int.Parse(match.Groups[4].Captures[i].Value));
}
foreach (var altSeq in alternateSequence)
{
result.Rules.Add(new Rule
{
Id = int.Parse(match.Groups[1].Value),
SubRules = altSeq
});
}
}
}
else
{
result.Messages.Add(line);
}
}
return(result);
}
