Day7

203. Remove Linked List Elements/Solution.cs

@@ -0,0 +1,29 @@
+namespace _203._Remove_Linked_List_Elements;
+
+public class Solution
+{
+    public ListNode? RemoveElements(ListNode? head, int val)
+    {
+        ListNode? first = null;
+        ListNode? current = null;
+        while (head != null)
+        {
+            if (head.val == val)
+            {
+                head = head.next;
+                continue;
+            }
+            if (first == null)
+                first = current = head;
+            else
+            {
+                current!.next = head;
+                current = current.next;
+            }
+            var buf = head;
+            head = head.next;
+            buf.next = null;
+        }
+        return first;
+    }
+}