# 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 lists ListNode类一维数组 # @return ListNode类 # class Solution: def mergeKLists(self , lists: List[ListNode]) -> ListNode: # write code he...