private static IPData ExtractIPData(string line)
{
IPData data = new IPData();
int index = 0;
for (int i = 0; i < line.Length; i++)
{
if (line[i] == '[')
{
data.Supernet.Add(line.Substring(index, i - index));
}
else if (line[i] == ']')
{
data.Hypernet.Add(line.Substring(index, i - index));
}
else if (i == line.Length - 1)
{
data.Supernet.Add(line.Substring(index, i - index + 1));
}
if (line[i] == '[' || line[i] == ']')
{
index = i + 1;
}
}
return(data);
}
private static List <string> ExtractABA(IPData ip)
{
List <string> abas = new List <string>();
foreach (var data in ip.Supernet)
{
for (int i = 0; i < data.Length - 2; i++)
{
var aba = data.Substring(i, 3);
if (data[i] == data[i + 2] && aba.Distinct().Count() != 1)
{
abas.Add(aba);
}
}
}
return(abas);
}
private static bool CheckForBAB(IPData ip, List <string> abas)
{
bool results = false;
List <string> babs = abas.Select(s => new string(new char[] { s[1], s[0], s[1] })).ToList();
foreach (var data in ip.Hypernet)
{
for (int i = 0; i < data.Length - 2; i++)
{
var chars = data.Substring(i, 3);
if (data[i] == data[i + 2] &&
chars.Distinct().Count() != 1 &&
babs.Contains(chars))
{
results = true;
}
}
}
return(results);
}
static void Main(string[] args)
{
string[] raw = File.ReadAllLines("data.txt");
int tsls = 0;
int ssls = 0;
foreach (var line in raw)
{
IPData data = ExtractIPData(line);
if (IsTLS(data))
{
tsls++;
}
if (IsSSL(data))
{
ssls++;
}
}
Console.WriteLine(tsls);
Console.WriteLine(ssls);
Console.ReadLine();
}
private static bool IsSSL(IPData data)
{
return(CheckForBAB(data, ExtractABA(data)));
}
private static bool IsTLS(IPData data)
{
return(data.Supernet.Select(d => TestForABBA(d)).Contains(true) &&
!data.Hypernet.Select(d => TestForABBA(d)).Contains(true));
}