Day8-9

83. Remove Duplicates from Sorted List/Solution.cs

@@ -0,0 +1,26 @@
+namespace _83._Remove_Duplicates_from_Sorted_List;
+
+public class Solution
+{
+    public ListNode? DeleteDuplicates(ListNode? head)
+    {
+        ListNode? first = null;
+        ListNode? current = null;
+        while (head != null)
+        {
+            if (first == null)
+                first = current = head;
+            if (head.val == current!.val)
+            {
+                head = head.next;
+                continue;
+            }
+            current!.next = head;
+            current = current.next;
+            head = head.next;
+        }
+        if(current != null)
+            current.next = null;
+        return first;
+    }
+}