[leetcode] Remove Nth Node From End of List

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

public class Solution { public ListNode removeNthFromEnd(ListNode head, int n) { ListNode fast = head; for (int i = 0; i < n; i++){ fast = fast.next; } ListNode previous = dummy; ListNode current = head; ListNode dummy = new ListNode(-1); dummy.next = head; while (fast != null){ fast = fast.next; previous = current; current = current.next; } previous.next = current.next; current.next = null; return dummy.next; } }