private static void TestRemoveKDigits()
{
string s = "1432519";
int k = 3;
Console.WriteLine(RemoveKDigits.fnRemoveKdigits(s, k));
}
public void Simple(string input, int k, long expected)
{
var actual = RemoveKDigits.Run(input, k);
Assert.That(actual, Is.EqualTo(expected));
}
