# 两数相加

<p>给你两个 <strong>非空</strong> 的链表，表示两个非负的整数。它们每位数字都是按照 <strong>逆序</strong> 的方式存储的，并且每个节点只能存储 <strong>一位</strong> 数字。</p><p>请你将两个数相加，并以相同形式返回一个表示和的链表。</p><p>你可以假设除了数字 0 之外，这两个数都不会以 0 开头。</p><p> </p><p><strong>示例 1：</strong></p><img alt="" src="https://img-service.csdnimg.cn/img_convert/3d2b007db4e6d4c6b2b5ec03d67f97e0.jpeg" style="width: 483px; height: 342px;" /><pre><strong>输入：</strong>l1 = [2,4,3], l2 = [5,6,4]<strong><br />输出：</strong>[7,0,8]<strong><br />解释：</strong>342 + 465 = 807.</pre><p><strong>示例 2：</strong></p><pre><strong>输入：</strong>l1 = [0], l2 = [0]<strong><br />输出：</strong>[0]</pre><p><strong>示例 3：</strong></p><pre><strong>输入：</strong>l1 = [9,9,9,9,9,9,9], l2 = [9,9,9,9]<strong><br />输出：</strong>[8,9,9,9,0,0,0,1]</pre><p> </p><p><strong>提示：</strong></p><ul>	<li>每个链表中的节点数在范围 <code>[1, 100]</code> 内</li>	<li><code>0 <= Node.val <= 9</code></li>	<li>题目数据保证列表表示的数字不含前导零</li></ul>

## template

```python
class ListNode:
	def __init__(self, val=0, next=None):
		self.val = val
		self.next = next
class LinkList:
	def __init__(self):
		self.head=None
	def initList(self, data):
		self.head = ListNode(data[0])
		r=self.head
		p = self.head
		for i in data[1:]:
			node = ListNode(i)
			p.next = node
			p = p.next
		return r
	def	convert_list(self,head):
		ret = []
		if head == None:
			return
		node = head
		while node != None:
			ret.append(node.val)
			node = node.next
		return ret
class Solution:
	def addTwoNumbers(self, l1: ListNode, l2: ListNode) -> ListNode:
		lrr = l1
		while True:
			l1.val = l1.val + l2.val
			if l1.next is None and l2.next is None and l1.val < 10:
				break
			if l1.next is None:
				l1.next = ListNode(0)
			if l2.next is None:
				l2.next = ListNode(0)
			if l1.val >= 10:
				l1.val = l1.val - 10
				l1.next.val += 1
			l1 = l1.next
			l2 = l2.next
		return lrr
# %%
l = LinkList()
list1 = [2,4,3]
list2 = [5,6,4]
l1 = l.initList(list1)
l2 = l.initList(list2)
s = Solution()
print(l.convert_list(s.addTwoNumbers(l1, l2)))
```

## 答案

```python

```

## 选项

### A

```python

```

### B

```python

```

### C

```python

```