static void Main(string[] args)
{
LinkListProblems llist = new LinkListProblems();
ListNode l1 = new ListNode(1);
//l1.next = new ListNode(4);
//l1.next.next = new ListNode(3);
ListNode l2 = new ListNode(9);
l2.next = new ListNode(9);
//l2.next.next = new ListNode(4);
llist.AddTwoNumbers(l1,l2);
}
public ListNode AddTwoNumbers(ListNode l1, ListNode l2)
{
ListNode resL = new ListNode(0);
ListNode pL1 = l1;
ListNode pL2 = l2;
ListNode result = resL;
int sum = int.MinValue;
int preValue = 0;
while (pL1 != null && pL2 != null)
{
sum = pL1.val + pL2.val + preValue;
preValue = sum / 10;
sum = sum % 10;
resL.next = new ListNode(sum);
pL1 = pL1.next;
pL2 = pL2.next;
resL = resL.next;
}
while (pL1 != null)
{
sum = pL1.val + preValue;
preValue = sum / 10;
sum = sum % 10;
resL.next = new ListNode(sum);
pL1 = pL1.next;
resL = resL.next;
}
while (pL2 != null)
{
sum = pL2.val + preValue;
preValue = sum / 10;
sum = sum % 10;
resL.next = new ListNode(sum);
pL2 = pL2.next;
resL = resL.next;
}
if (preValue > 0)
{
resL.next = new ListNode(preValue);
}
return result.next;
}
private ListNode <T> this[long index]
{
get
{
if (index < 0 || index > this.Count - 1)
{
throw new ArgumentOutOfRangeException("index", "Index cannot be negative or bigger than the count of elements - 1.");
}
long i = 0;
ListNode <T> currentNode = this.head;
while (i != index)
{
currentNode = currentNode.NextNode;
i++;
}
return(currentNode);
}
}
public void Test(int[] input, int[] output, int target)
{
var head = CreateLinkedList(input);
var empty = new ListNode(-1, head);
var copyEmpty = empty;
while (empty.next != null)
{
if (empty.next.val == target)
{
empty.next = empty.next?.next;
}
else
{
empty = empty.next;
}
}
ToArray(copyEmpty.next).Should().BeEquivalentTo(output);
}
private T RemoveAt(int index)
{
if (index >= count || index < 0)
{
throw new ArgumentOutOfRangeException("Invalid index: " + index);
}
// Find the element at the specified index
int currentIndex = 0;
ListNode currentNode = this.head;
ListNode prevNode = null;
while (currentIndex < index)
{
prevNode = currentNode;
currentNode = currentNode.NextNode;
currentIndex++;
}
// Remove the foung element from the list of nodes
RemoveListNode(currentNode, prevNode);
return currentNode.Element;
}
public static LinkedList.ListNode MoveZerosToFront(LinkedList.ListNode head)
{
var currentNode = head;
while (currentNode != null)
{
if (currentNode.Next != null)
{
if (currentNode.Next.Data == 0)
{
var nodeToBeMoved = currentNode.Next;
currentNode.Next = nodeToBeMoved.Next;
nodeToBeMoved.Next = head;
head = nodeToBeMoved;
}
}
currentNode = currentNode.Next;
}
return(head);
}
public ListNode MergeTwoLists(ListNode l1, ListNode l2)
{
ListNode list1 = l1;
ListNode list2 = l2;
if (list1 == null && list2 == null)
{
return(list1);
}
List <ListNode> arrList = new List <ListNode>();
while (list1 != null)
{
arrList.Add(list1);
list1 = list1.next;
}
while (list2 != null)
{
arrList.Add(list2);
list2 = list2.next;
}
List <ListNode> SortedList = arrList.OrderBy(o => o.val).ToList();
ListNode head = new ListNode(SortedList[0].val);
ListNode temp = head;
for (int i = 1; i < SortedList.Capacity; i++)
{
ListNode newNode = new ListNode(SortedList[i].val);
temp.next = newNode;
temp = newNode;
}
return(head);
}
private void RemoveListNode(ListNode node, ListNode prevNode)
{
count--;
if (count == 0)
{
// The list becomes empty
this.head = null;
this.tail = null;
}
else if (prevNode == null)
{
// The head node was removed --> update the head
this.head = node.NextNode;
}
else
{
prevNode.NextNode = node.NextNode;
}
// Fix the tail in case it was removed
if (object.ReferenceEquals(this.tail, node))
{
this.tail = prevNode;
}
}
public ListNode CreateLinkedList(int[] numbers)
{
if (numbers == null || !numbers.Any())
{
return(null);
}
if (numbers.Length == 1)
{
return(new ListNode(numbers.First()));
}
var root = new ListNode(numbers.First());
var current = root;
foreach (var number in numbers.Skip(1))
{
var newNode = new ListNode(number);
current.next = newNode;
current = newNode;
}
return(root);
}
public DynamicList()
{
this.head = null;
this.tail = null;
this.count = 0;
}
static void Main(string[] args)
{
Program p = new Program();
//FrequencyLinkedListNode root= p.GetWordCountsInLinkedList("this is a this is mega a a a this this this ".Split().ToList());
//Console.WriteLine(root);
//FrequencyLinkedListNode cur = root;
//while (cur != null)
//{
// Console.WriteLine(cur.word+" "+cur.frequency);
// cur=cur.next;
//}
//VertexedLinkedListNode root, n1, n2,n3,n4,n5,n6;
//n6 = new VertexedLinkedListNode(8, null, true);
//n5 = new VertexedLinkedListNode(8, n6, true);
//n4 = new VertexedLinkedListNode(8, n5, true);
//n3 = new VertexedLinkedListNode(8, n4, true);
//n2 = new VertexedLinkedListNode(8, n3, true);
//n1 = new VertexedLinkedListNode(8, n2, true);
//root = new VertexedLinkedListNode(5, n1, true);
//Console.WriteLine(p.MaxDistanceBetweenVertices(root));
//ListNode n2 = null;
//ListNode n4 = new ListNode(6, n2);
//ListNode n3 = new ListNode(5, n4);
//n2 = new ListNode(4, n3);
//n4.next = n2;
//ListNode root = new ListNode(3, n2);
//LinkedList ll = new LinkedList(root);
//// root1 = p.Merge(root1, root2);
//while (root1 != null)
//{
// Console.WriteLine(root1.data);
// root1 = root1.next;
//}
// Console.WriteLine(ll.ToString());
//Console.Write(ll.DetectCycle(ll.head));
//Console.WriteLine(ll.GetCycleListLength(ll.head));
//DoubleListNode n1, n2, n3, n4, n5;
//n1 = new DoubleListNode(1, 0);
//n2 = new DoubleListNode(2, 1);
//n3 = new DoubleListNode(3, 2);
//n4 = new DoubleListNode(4, 1);
//PriorityQueue pq = new PriorityQueue();
//pq.Enqueue(n1);
//pq.Enqueue(n2);
//pq.Enqueue(n3);
//pq.Enqueue(n4);
//DoubleListNode d = pq.Deque();
//pq.Enqueue(new DoubleListNode(5, 0));
//d = pq.Deque();
//d = pq.Deque();
//Console.WriteLine(d.data + " " + d.priority);
ListNode root, n1,n2,n3,n4,n5,n6;
n6 = new ListNode(7, null);
n5 = new ListNode(6, n6);
n4 = new ListNode(5, n5);
n3 = new ListNode(4, n4);
n2 = new ListNode(3, n3);
n1 = new ListNode(2, n2);
root = new ListNode(1, n1);
//ListNode root1, n3, n4;
//n4 = new ListNode(10, null);
//n3 = new ListNode(6, n4);
//root1 = new ListNode(3, n3);
ListNode cur = p.SwapAdjacent2(root);
while (cur != null)
{
Console.WriteLine(cur);
cur = cur.next;
}
}
public void Remove(ListNode <T> target)
{
var index = target._index;
Remove(index);
}
internal bool DetectCycle(ListNode head)
{
if (head.next == null || head == null)
return false;
ListNode slow = head;
ListNode fast = head.next;
while (slow != null && fast != null && fast.next !=null)
{
if (fast.next == slow || fast == slow)
return true;
else
{
slow = slow.next;
fast = fast.next.next;
}
}
return false;
}
public ListNode <T> AddBefore(ListNode <T> target, T value)
{
return(_reverse.Add(target, value));
}
public ListNode <T> AddAfter(ListNode <T> target, T value)
{
return(_forward.Add(target, value));
}
public LinkedList(ListNode head)
{
this.head = head;
}
internal int GetCycleListLength(ListNode head)
{
if (head == null)
return 0;
int count = 0;
ListNode slow = head;
ListNode fast = head;
while (fast.next != null)
{
slow = slow.next;
fast = fast.next.next;
count++;
if (fast == slow)
break;
}
slow = head;
while (fast != slow)
{
count++;
slow = slow.next;
fast = fast.next;
}
return count;
}
ListNode SwapAdjacent2(ListNode head)
{
ListNode cur = head;
ListNode temp= null;
while (cur != null && cur.next != null)
{
ListNode forward = cur.next;
cur.next = forward.next;
forward.next = cur;
if (cur == head)
head = forward;
if (temp != null)
temp.next = forward;
temp = cur;
cur = cur.next;
}
return head;
}
public ListNode(T element, ListNode prevNode)
{
this.Element = element;
prevNode.NextNode = this;
}
internal ListNode GetCycleStartNode(ListNode head)
{
if (head == null )
return null;
ListNode slow = head;
ListNode fast = head;
while (fast.next !=null)
{
slow = slow.next;
fast = fast.next.next;
if (fast == slow)
break;
}
slow = head;
while (fast != slow)
{
slow = slow.next;
fast = fast.next;
}
return fast;
}
public ListNode(int data, ListNode next)
{
this.data = data;
this.next = next;
}
ListNode SwapAdjacent(ListNode head)
{
ListNode prev = null, cur = head;
while (cur != null && cur.next != null)
{
if (prev == null)
{
head = cur.next;
ListNode temp = cur.next.next;
cur.next.next = cur;
cur.next = temp;
prev = cur;
}
else
{
prev.next = cur.next;
cur.next = cur.next.next;
prev.next.next = cur;
prev = cur;
}
cur = cur.next;
}
return head;
}
//Merge in merge sort for linked list
ListNode Merge(ListNode h1, ListNode h2)
{
if (h2 == null) return h1;
if (h1 == null) return h2;
ListNode cur1 = h1, cur2 = h2;
while (cur2 != null)
{
if (cur1.data >= cur2.data)
{
ListNode temp = cur2.next;
cur2.next = cur1;
cur1 = cur2;
cur2 = temp;
}
else
{
while ( cur1.next != null && cur1.next.data < cur2.data)
{
cur1 = cur1.next;
}
if (cur1.next == null)
{
cur1.next = cur2;
return cur1;
}
else
{
ListNode temp = cur2.next;
cur2.next = cur1.next;
cur1.next = cur2;
cur2 = temp;
}
}
}
return h1;
}
public ListNode(T element)
{
this.Element = element;
NextNode = null;
}