class ListNode:

def init(self, x):

self.val = x

self.next = None

代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可

@param pHead ListNode类

@param k int整型

@return ListNode类

class Solution: def FindKthToTail(self , pHead , k ): # write code here slow, fast = pHead, pHead for _ in range(k): if not fast: return None fast = fast.next while fast: fast = fast.next slow = slow.next

    return slow