public void InitializeTest()
{
Assert.DoesNotThrow(() => StringAlgorithm.SuffixArray("".AsSpan()));
Assert.DoesNotThrow(() => StringAlgorithm.SuffixArray <int>(Array.Empty <int>()));
Assert.DoesNotThrow(() => StringAlgorithm.ZAlgorithm("".AsSpan()));
Assert.DoesNotThrow(() => StringAlgorithm.ZAlgorithm <int>(Array.Empty <int>()));
}
public void EmptyTest()
{
Assert.That(StringAlgorithm.SuffixArray("".AsSpan()).Length, Is.Zero);
Assert.That(StringAlgorithm.SuffixArray <int>(Array.Empty <int>()).Length, Is.Zero);
Assert.That(StringAlgorithm.ZAlgorithm("".AsSpan()).Length, Is.Zero);
Assert.That(StringAlgorithm.ZAlgorithm <int>(Array.Empty <int>()).Length, Is.Zero);
}
public static void Solve()
{
var S = Console.ReadLine();
var sa = StringAlgorithm.SuffixArray(S);
var answer = (long)S.Length * (S.Length + 1) / 2;
answer = StringAlgorithm.LongestCommonPrefixArray <char>(S, sa)
.Aggregate(answer, (sum, x) => sum - x);
Console.WriteLine(answer);
}
public static void Solve()
{
var S = Scanner.Scan <string>();
var sa = StringAlgorithm.SuffixArray(S);
var answer = (long)S.Length * (S.Length + 1) / 2;
foreach (var x in StringAlgorithm.LCPArray(S, sa))
{
answer -= x;
}
Console.WriteLine(answer);
}
public static void Solve()
{
var N = Scanner.Scan <int>();
var S = Scanner.Scan <string>();
var sa = StringAlgorithm.SuffixArray(S);
var lcp = StringAlgorithm.LongestCommonPrefixArray(S, sa);
var answer = new long[N];
for (var i = 0; i < N; i++)
{
answer[i] = N - i;
}
for (var k = 0; k < 2; k++)
{
var stack = new Stack <(long H, long W)>();
var s = 0L;
for (var i = 0; i < N - 1; i++)
{
var w = 1L;
while (stack.TryPeek(out var top) && top.H > lcp[i])
{
w += top.W;
s -= top.H * top.W;
stack.Pop();
}
s += lcp[i] * w;
stack.Push((lcp[i], w));
answer[sa[i + 1]] += s;
}
Array.Reverse(sa);
Array.Reverse(lcp);
}
Console.WriteLine(string.Join("\n", answer));
}
public void SuffixArrayTest()
{
const string str = "missisippi";
var sa = StringAlgorithm.SuffixArray(str);
var answer = new[]
{
"i", // 9
"ippi", // 6
"isippi", // 4
"issisippi", // 1
"missisippi", // 0
"pi", // 8
"ppi", // 7
"sippi", // 5
"sisippi", // 3
"ssisippi" // 2
};
Assert.That(sa.Length, Is.EqualTo(answer.Length));
for (var i = 0; i < sa.Length; i++)
{
Assert.That(str[sa[i]..], Is.EqualTo(answer[i]));