题解 | #合并k个已排序的链表#

# 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:
        # initiate the aux list
        tmp = []
        for head in lists:
            while head:
                tmp.append(head.val)
                head = head.next
        tmp.sort()
        # initiate the result listnode
        res = ListNode(0)
        cur = res
        for val in tmp:
            cur.next = ListNode(val)
            cur = cur.next
        return res.next