這個寫的是賊尷尬,人家十幾行寫完了,我寫n多,繼續學習哎!

class Node(object):
    def __init__(self, value):
        self.value = value
        self.next = None

    def set_next(self, next):
        self.next = next

    def get_next_value(self):
        if self.next:
            return self.next.value


class Link(object):

    def __init__(self):
        self.root: Node = None
        self.length = 0

    def add(self, node: Node):
        if not self.root:
            self.root = node
        else:
            temp = self.root
            while temp.next:
                temp = temp.next
            temp.next = node
        self.length += 1

    def show(self):
        temp = self.root
        while temp.next:
            print(temp.value, end="")
            temp = temp.next
        print(temp.value)

    def add_num(self, num: str):
        for item in num:
            node = Node(item)
            self.add(node)


if __name__ == '__main__':
    num1 = '9999999999999'
    num2 = '101010101'

    l1 = Link()
    l1.add_num(num1[::-1])
    l1.show()

    l2 = Link()
    l2.add_num(num2[::-1])
    l2.show()

    # print(l1.root.value)
    # print(l2.root.value)
    # print(l1.length)
    # print(l2.length)

    def addTwoNumbers(l1: Link, l2: Link):
        """
        :type l1: ListNode
        :type l2: ListNode
        :rtype: ListNode
        """
        if not l1.root and l2.root:
            return l2

        if not l2.root and l2.root:
            return l1

        if not (l1.root and l2.root):
            print('滾開請不要玩了')

        length = min((l1.length, l2.length))

        temp1: Node = l1.root
        temp2: Node = l2.root

        next_add = 0

        new_link = Link()
        while length > 0:
            total = int(temp1.value) + int(temp2.value)
            if next_add > 0:
                total += next_add
            next_add, cur_num = get_div(total)
            cur_node = Node(cur_num)
            new_link.add(cur_node)

            temp1 = temp1.next
            temp2 = temp2.next
            length -= 1

        last_temp: Node = temp1 or temp2
        # 處理連結串列剩餘的元素
        while next_add or last_temp:
            while last_temp:
                next_add, cur_num2 = get_div(int(last_temp.value) + next_add)
                node = Node(cur_num2)
                new_link.add(node)

                # if not next_add:
                # 這裡我本來想如果next_add ==0的時候直接將,last_temp的next賦給new_list,但是Link中維持了一個length,這一樣會讓它出錯,而且經過測試之後時間差不多所以就不改了
                #     new_link.add(last_temp.next)
                #     last_temp = None
                #     break

                last_temp = last_temp.next
            else:
                if next_add:
                    node = Node(next_add)
                    new_link.add(node)
                    next_add = 0
        new_link.show()


    def get_div(total):
        n, m = divmod(total, 10)  # n是total//10取模的結果,m是total%10除數的結果

        return n, m

    start = time.time()
    addTwoNumbers(l1, l2)
    print(time.time() - start)