Update No206

Author: tujietg

leetcode/LinkedList/No206.java

@@ -27,4 +27,25 @@ public ListNode reverseList01(ListNode head) {
 		head.next = null;
 		return newList;
 	}
+	//三指针解决、
+	public ListNode reverseList(ListNode head) {
+        if(head == null){
+            return null;
+        }
+        ListNode current = head;
+        ListNode pre = null;
+        ListNode newHead = null;
+        while(current != null){
+            ListNode next = current.next;
+            if(next == null){
+               newHead = current;
+            }
+            current.next = pre;
+            pre = current;
+            current = next;
+        }
+     	   return newHead;
+   	}
+
+	
 }