//question2
public string GetCommonString()
{
string[] ids = System.IO.File.ReadAllLines(inputPath);
var res = new RepeatCounter();
for (int i = 0; i < ids.Length; i++)
{
for (int j = i + 1; j < ids.Length; j++)
{
string id1 = ids[i];
string id2 = ids[j];
if (Distance(id1, id2) == 1)
{
return(CommonString(id1, id2));
}
}
}
return(null);
}
private RepeatCounter Count(string s)
{
int[] counter = new int[26];
var res = new RepeatCounter();
foreach (char c in s.ToCharArray())
{
counter[(c - 'a')]++;
}
foreach (int count in counter)
{
if (count == 2)
{
res.DoubleCount = 1;
}
else if (count == 3)
{
res.TripleCount = 1;
}
}
return(res);
}