private static void PrintCloneLinkedList <TValue>(LinkedListNodeWithRandomReference <TValue> originalListHead)
{
Console.WriteLine("Original Linked List (Before): " + originalListHead);
// Interleave nodes in cloned list in original list.
for (LinkedListNodeWithRandomReference <TValue> originalListNode = originalListHead; originalListNode != null; originalListNode = originalListNode.next.next)
{
LinkedListNodeWithRandomReference <TValue> clonedListNode = new LinkedListNodeWithRandomReference <TValue>(originalListNode.value, originalListNode.next);
originalListNode.next = clonedListNode;
}
// Update random nodes in cloned list.
for (LinkedListNodeWithRandomReference <TValue> originalListNode = originalListHead; originalListNode != null; originalListNode = originalListNode.next.next)
{
originalListNode.next.random = originalListNode.random?.next;
}
LinkedListNodeWithRandomReference <TValue> clonedListHead = originalListHead?.next;
// Separate out the cloned list from original list.
for (LinkedListNodeWithRandomReference <TValue> originalListNode = originalListHead; originalListNode != null; originalListNode = originalListNode.next)
{
LinkedListNodeWithRandomReference <TValue> originalListNextNode = originalListNode.next.next;
originalListNode.next.next = originalListNextNode?.next;
originalListNode.next = originalListNextNode;
}
Console.WriteLine("Original Linked List (After): " + originalListHead);
Console.WriteLine("Cloned Linked List: " + clonedListHead);
}
public override string ToString()
{
StringBuilder stringBuilder = new StringBuilder();
for (LinkedListNodeWithRandomReference <T> node = this; node != null; node = node.next)
{
string randomeNodeValue = node.random == null ? "N" : node.random.value.ToString();
stringBuilder.Append($"({node.value}, {randomeNodeValue}) ");
}
return(stringBuilder.ToString());
}
public static void Main(string[] args)
{
// Prepare linked list.
LinkedListNodeWithRandomReference <int> node5 = new LinkedListNodeWithRandomReference <int>(5, null);
LinkedListNodeWithRandomReference <int> node4 = new LinkedListNodeWithRandomReference <int>(4, node5);
LinkedListNodeWithRandomReference <int> node3 = new LinkedListNodeWithRandomReference <int>(3, node4);
LinkedListNodeWithRandomReference <int> node2 = new LinkedListNodeWithRandomReference <int>(2, node3);
LinkedListNodeWithRandomReference <int> node1 = new LinkedListNodeWithRandomReference <int>(1, node2);
// Setup random references.
node1.random = node2;
node2.random = node4;
node3.random = null;
node4.random = node2;
node5.random = node5;
PrintCloneLinkedList(node1);
}
public LinkedListNodeWithRandomReference(T value, LinkedListNodeWithRandomReference <T> next, LinkedListNodeWithRandomReference <T> random = null)
{
this.value = value;
this.next = next;
this.random = random;
}
