Update 09. 删除链表的倒数第 N 个结点.md

Author: jasoncao11

09. 删除链表的倒数第 N 个结点.md

@@ -36,15 +36,14 @@ class Solution:
     def removeNthFromEnd(self, head: ListNode, n: int) -> ListNode:
         #借助快慢指针，找到要删除节点的前驱节点
         dummy = ListNode(0, head)
-        second = dummy
-        first = head
+        second = first = dummy
 
-        for i in range(n):
+        for i in range(n+1):
             first = first.next
 
         while first:
             first = first.next
             second = second.next
         second.next = second.next.next
         return dummy.next
-```
+```