public void UnrankStringLenTwo()
{
string s = "xy";
int n = s.Length;
Console.WriteLine(string.Format("s:{0}", s));
for (int r = 0; r < n; r++)
{
int[] pi = RankUnrank.InitIndexArray(n);
RankUnrank.Unrank(n, r, pi);
string ps = GetPermString(s, pi);
Console.WriteLine(string.Format("r:{0} p:{1}", r, ps));
int[] inv = RankUnrank.GetInverseArray(pi);
long rank = RankUnrank.Rank(n, pi, inv);
Assert.AreEqual(r, rank);
}
}
