# Leetcode - Remove Nth Node From End of List

violet posted @ Jun 25, 2020 05:20:11 AM in 算法 with tags Algorithm Golang Linked List , 326 阅读

https://leetcode.com/problems/remove-nth-node-from-end-of-list/

Given a linked list, remove the n-th node from the end of list and return its head.

Example:

```Given linked list: 1->2->3->4->5, and n = 2.

After removing the second node from the end, the linked list becomes 1->2->3->5.
```

Note:

Given n will always be valid.

Could you do this in one pass?

```/**
* Definition for singly-linked list.
* type ListNode struct {
*     Val int
*     Next *ListNode
* }
*/
func removeNthFromEnd(head *ListNode, n int) *ListNode {
for i := 0 ; i < n; i++ {
fast = fast.Next
}
if fast == nil {
// n == list length
}
for fast.Next != nil {
fast = fast.Next
slow = slow.Next
}

slow.Next = slow.Next.Next
}```
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