Remove Nth Node From End of List

class Solution:
    def removeNthFromEnd(
        self, head: ListNode | None, n: int
    ) -> ListNode | None:
        dummy = ListNode(0, head)
        left = dummy
        right = head
        for _ in range(n):
            right = right.next
        while right:
            left = left.next
            right = right.next
        left.next = left.next.next
        return dummy.next