feixiangcode
diff --git a/‎Week_01/id_12/LeetCode_83_12.php‎
Lines changed: 22 additions & 0 deletions b/‎Week_01/id_12/LeetCode_83_12.php‎
Lines changed: 22 additions & 0 deletions
@@ -0,0 +1,22 @@
+/**
+ * Definition for a singly-linked list.
+ * class ListNode {
+ *     public $val = 0;
+ *     public $next = null;
+ *     function __construct($val) { $this->val = $val; }
+ * }
+ */
+
+class Solution {
+    public function deleteDuplicates($headNode) { 
+        $current = $headNode;
+        while($current->next !=null){
+            if($current->val == $current->next->val ){
+               $current->next = $current->next->next;
+            }else{
+                $current = $current->next;
+            }
+        }    
+        return $headNode;
+    }
+}