题目描述

blablabla

样例

blablabla

对刷完剑指offer就改名老哥的题解的一点改动

算法1

python 代码

class Solution(object):
    def merge(self, l1, l2):
        """
        :type l1: ListNode
        :type l2: ListNode
        :rtype: ListNode
        """
        dummy = ListNode(-1)
        cur = dummy
        while l1 and l2:
            if l1.val<=l2.val:
                cur.next = l1
                l1 = l1.next
            elif l2.val < l1.val:
                cur.next = l2
                l2 = l2.next
            cur = cur.next
        while l1:
            cur.next = l1
            l1 = l1.next
            cur = cur.next
        while l2:
            cur.next = l2
            l2 = l2.next
            cur = cur.next
        return dummy.next