无法播放？请 点击这里 跳转到Youtube
切换视频源：

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

Java

class Solution {
    public ListNode removeNthFromEnd(ListNode head, int n) {
        ListNode dummy = new ListNode(0);
        dummy.next = head;
        
        ListNode slow = dummy, fast = dummy;
        for (int i = 0; i < n; i++) {
            fast = fast.next;
        }
        
        while (fast.next != null) {
            slow = slow.next;
            fast = fast.next;
        }
        
        slow.next = slow.next.next;
        return dummy.next;
    }
}

Python

class Solution:
    def removeNthFromEnd(self, head: ListNode, n: int) -> ListNode:
        dummy = ListNode(0)
        dummy.next = head
        
        slow = dummy
        fast = dummy
        for i in range(n):
            fast = fast.next
            
        while fast.next is not None:
            fast = fast.next
            slow = slow.next
        
        slow.next = slow.next.next
        return dummy.next