public void Test()
{
ZAlgorithm algorithm = new ZAlgorithm("abcdaaabchoabcd");
Assert.That(algorithm.Lcp[1] == 0);
Assert.That(algorithm.Lcp[2] == 0);
Assert.That(algorithm.Lcp[3] == 0);
Assert.That(algorithm.Lcp[4] == 1);
Assert.That(algorithm.Lcp[5] == 1);
Assert.That(algorithm.Lcp[6] == 3);
Assert.That(algorithm.Lcp[7] == 0);
Assert.That(algorithm.Lcp[8] == 0);
Assert.That(algorithm.Lcp[9] == 0);
Assert.That(algorithm.Lcp[10] == 0);
Assert.That(algorithm.Lcp[11] == 4);
Assert.That(algorithm.Lcp[12] == 0);
Assert.That(algorithm.Lcp[13] == 0);
Assert.That(algorithm.Lcp[14] == 0);
Assert.That(algorithm.Compare(0) == 0);
Assert.That(algorithm.Compare(1) > 0);
Assert.That(algorithm.Compare(2) > 0);
Assert.That(algorithm.Compare(3) > 0);
Assert.That(algorithm.Compare(4) < 0);
Assert.That(algorithm.Compare(5) < 0);
Assert.That(algorithm.Compare(6) > 0);
Assert.That(algorithm.Compare(7) > 0);
Assert.That(algorithm.Compare(8) > 0);
Assert.That(algorithm.Compare(9) > 0);
Assert.That(algorithm.Compare(10) > 0);
Assert.That(algorithm.Compare(11) < 0);
Assert.That(algorithm.Compare(12) > 0);
Assert.That(algorithm.Compare(13) > 0);
Assert.That(algorithm.Compare(14) > 0);
}
public void String_Z_Test()
{
var kmpAlgo = new ZAlgorithm();
var index = kmpAlgo.Search("xabcabzabc", "abc");
Assert.AreEqual(1, index);
index = kmpAlgo.Search("abdcdaabxaabxcaabxaabxay", "aabxaabxcaabxaabxay");
Assert.AreEqual(5, index);
index = kmpAlgo.Search("aaaabaaaaaaa", "aaaa");
Assert.AreEqual(0, index);
index = kmpAlgo.Search("abcabababdefgabcd", "fga");
Assert.AreEqual(11, index);
index = kmpAlgo.Search("abxabcabcaby", "abcaby");
Assert.AreEqual(6, index);
index = kmpAlgo.Search("abxabcabcaby", "abx");
Assert.AreEqual(0, index);
}
public int StrStr(string haystack, string needle)
{
if (string.IsNullOrWhiteSpace(needle))
{
return(0);
}
var indices = ZAlgorithm.FindPattern(haystack, needle);
return(indices.Length == 0 ? -1 : indices[0]);
}
public static ZFunction FromString(string text, ZAlgorithm algorithm)
{
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
switch (algorithm)
{
case ZAlgorithm.Naive:
return(FromStringNaive(text));
case ZAlgorithm.Linear:
return(FromStringLinear(text));
default:
throw new NotImplementedException($"Algorithm {algorithm} is not implemented");
}
}
public override IEnumerable <object> Solve(TextReader inputStream)
{
_ = inputStream.ReadInt();
var s = inputStream.ReadLine();
var max = 0;
for (int start = 0; start < s.Length; start++)
{
var zAlgo = ZAlgorithm.SearchAll(s.AsSpan().Slice(start));
for (int i = 0; i < zAlgo.Length; i++)
{
max = Math.Max(max, Math.Min(i, zAlgo[i]));
}
}
yield return(max);
}
public void ZAlgorithmSumomoTest(string input, params int[] expected)
{
var z = ZAlgorithm.SearchAll(input);
Assert.Equal(expected, z);
}
public void Test1()
{
ZAlgorithm algorithm = new ZAlgorithm("-----");
Assert.That(algorithm.Compare(2) < 0);
}