题目描述
输入一个链表,输出该链表
# -*- coding:utf-8 -*-
# class ListNode:
# def __init__(self, x):
# self.val = x
# self.next = None
class Solution:
def FindKthToTail(self, head, k):
# write code here
L=[]
while head:
L.append(head)
head=head.next
if k>len(L) or k<1:
return None
return L[-k]
中倒数第k个结点。