# 19. Remove Nth Node From End of List
###### tags: `LeetCode筆記` `鏈結串列`
## 思路:
1. 知道linked list 的travel
2. 知道邊際值問題
3. leetcode 的head 不用用self.head
```python=
num=0
current=head
while current :
num+=1
current=current.next
position= num-n
current_2=head
count=1
if position==0 :
return head.next
while current_2:
if count==position:
current_2.next=current_2.next.next
current_2=current_2.next
count+=1
return head
```