public static int Part2(List <string> lines)
{
lines.Add("");
int count = 0;
List <char> GroupCharacters = new List <char>();
bool inGroup = false;
foreach (string line in lines)
{
if (line.Length == 0)
{
int increment = GroupCharacters.Distinct().Count();;
count += increment;
GroupCharacters = new List <char>();
inGroup = false;
}
else
{
List <char> x = line.ToCharArray().ToList();
if (GroupCharacters.Count == 0 && !inGroup)
{
GroupCharacters.AddRange(x);
inGroup = true;
}
else
{
GroupCharacters = GroupCharacters.Where(z => x.Contains(z)).ToList();
}
}
}
return(count);
}
public static int Part1(List <string> lines)
{
lines.Add("");
int count = 0;
List <char> GroupCharacters = new List <char>();
foreach (string line in lines)
{
if (line.Length == 0)
{
count += GroupCharacters.Count();
GroupCharacters = new List <char>();
}
else
{
List <char> x = line.ToCharArray().ToList();
GroupCharacters.AddRange(x);
GroupCharacters = GroupCharacters.Distinct().ToList();
}
}
return(count);
}