C-Sharp/Algorithms/Sequences/KolakoskiSequence.cs at master · TheAlgorithms/C-Sharp · GitHub

Name: C-Sharp/Algorithms/Sequences/KolakoskiSequence.cs at master · TheAlgorithms/C-Sharp · GitHub
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usingSystem.Collections.Generic;
usingSystem.Numerics;

namespaceAlgorithms.Sequences;

/// <summary>
/// <para>
/// Kolakoski sequence; n-th element is the length of the n-th run in the sequence itself.
/// </para>
/// <para>
/// Wikipedia: https://en.wikipedia.org/wiki/Kolakoski_sequence.
/// </para>
/// <para>
/// OEIS: https://oeis.org/A000002.
/// </para>
/// </summary>
publicclassKolakoskiSequence:ISequence
{
/// <summary>
/// Gets Kolakoski sequence.
/// </summary>
publicIEnumerable<BigInteger>Sequence
{
get
{
yieldreturn1;
yieldreturn2;
yieldreturn2;

varqueue=newQueue<int>();
queue.Enqueue(2);
varnextElement=1;
while(true)
{
varnextRun=queue.Dequeue();
for(vari=0;i<nextRun;i++)
{
queue.Enqueue(nextElement);
yieldreturnnextElement;
}

nextElement=1+nextElement%2;
}
}
}
}