LeetCode | 两数之和除以10

class ListNode(object):
    def __init__(self, x):
        self.val = x
        self.next = None

    def addTwoNumbers(l1, l2):
        carry = 0
        root = n = ListNode(0)
        while l1 or l2 or carry:
            v1 = v2 = 0
            if l1:
                v1 = l1.val
                l1 = l1.nex
            if l2:
                v2 = l2.val
                l2 = l2.next
            carry, val = divmod(v1+v2+carry, 10)
        n.next = ListNode(val)
        n = n.next
        return root.next

l1 = [2,4,3]
l2 = [5,6,4]


print (ListNode.addTwoNumbers(l1,l2))