public static bool Checkv1(string input1, string palin)
{
if (!Exo4Helpers.CheckIfIsPalin(palin))
{
return(false);
}
return(input1.GroupBy(c => c).Count(c => c.Count() % 2 == 1) <= 1);
}
public static bool Checkv2(string input1, string palin)
{
if (!Exo4Helpers.CheckIfIsPalin(palin))
{
return(false);
}
var frequency = Exo4Helpers.Frequency(input1);
int oddFound = 0;
foreach (int count in frequency.Values)
{
if (count % 2 != 0 && ++oddFound == 2)
{
return(false);
}
}
return(true);
}